Home / 128,897.50-193,346.25-45,794.78

Finding the Fourth Proportional to 128,897.50, 193,346.25 and 45,794.78

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Solution

The fourth proportional to 128,897.50, 193,346.25 and 45,794.78 is: 68,692.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.50 : 193,346.25 = 45,794.78 : x
  2. Step 2: Convert to fraction form
    128,897.50/193,346.25 = 45,794.78/x
  3. Step 3: Cross multiply
    128,897.50x = 193,346.25 × 45,794.78
  4. Step 4: Simplify right side
    128,897.50x = 8,854,248,982.58
  5. Step 5: Solve for x
    x = 8,854,248,982.58/128,897.50
  6. Step 6: Final answer
    x = 68,692.17

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.