Home / 128,947.70-193,421.55-84,710.90

Finding the Fourth Proportional to 128,947.70, 193,421.55 and 84,710.90

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Solution

The fourth proportional to 128,947.70, 193,421.55 and 84,710.90 is: 127,066.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,947.70 : 193,421.55 = 84,710.90 : x
  2. Step 2: Convert to fraction form
    128,947.70/193,421.55 = 84,710.90/x
  3. Step 3: Cross multiply
    128,947.70x = 193,421.55 × 84,710.90
  4. Step 4: Simplify right side
    128,947.70x = 16,384,913,579.90
  5. Step 5: Solve for x
    x = 16,384,913,579.90/128,947.70
  6. Step 6: Final answer
    x = 127,066.35

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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.