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Finding the Fourth Proportional to 71,239.74, 98,306.76 and 39,406.74

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Solution

The fourth proportional to 71,239.74, 98,306.76 and 39,406.74 is: 54,379.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,239.74 : 98,306.76 = 39,406.74 : x
  2. Step 2: Convert to fraction form
    71,239.74/98,306.76 = 39,406.74/x
  3. Step 3: Cross multiply
    71,239.74x = 98,306.76 × 39,406.74
  4. Step 4: Simplify right side
    71,239.74x = 3,873,948,931.56
  5. Step 5: Solve for x
    x = 3,873,948,931.56/71,239.74
  6. Step 6: Final answer
    x = 54,379.04

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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.