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Finding the Fourth Proportional to 100,641.35, 138,892.32 and 60,354.38

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Solution

The fourth proportional to 100,641.35, 138,892.32 and 60,354.38 is: 83,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,641.35 : 138,892.32 = 60,354.38 : x
  2. Step 2: Convert to fraction form
    100,641.35/138,892.32 = 60,354.38/x
  3. Step 3: Cross multiply
    100,641.35x = 138,892.32 × 60,354.38
  4. Step 4: Simplify right side
    100,641.35x = 8,382,760,207.59
  5. Step 5: Solve for x
    x = 8,382,760,207.59/100,641.35
  6. Step 6: Final answer
    x = 83,293.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.