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Finding the Fourth Proportional to 71,929.32, 99,265.82 and 40,098.40

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Solution

The fourth proportional to 71,929.32, 99,265.82 and 40,098.40 is: 55,337.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,929.32 : 99,265.82 = 40,098.40 : x
  2. Step 2: Convert to fraction form
    71,929.32/99,265.82 = 40,098.40/x
  3. Step 3: Cross multiply
    71,929.32x = 99,265.82 × 40,098.40
  4. Step 4: Simplify right side
    71,929.32x = 3,980,400,556.69
  5. Step 5: Solve for x
    x = 3,980,400,556.69/71,929.32
  6. Step 6: Final answer
    x = 55,337.66

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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.