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Finding the Fourth Proportional to 128,897.70, 193,346.55 and 35,412.90

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Solution

The fourth proportional to 128,897.70, 193,346.55 and 35,412.90 is: 53,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.70 : 193,346.55 = 35,412.90 : x
  2. Step 2: Convert to fraction form
    128,897.70/193,346.55 = 35,412.90/x
  3. Step 3: Cross multiply
    128,897.70x = 193,346.55 × 35,412.90
  4. Step 4: Simplify right side
    128,897.70x = 6,846,962,040.50
  5. Step 5: Solve for x
    x = 6,846,962,040.50/128,897.70
  6. Step 6: Final answer
    x = 53,119.35

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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.