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Finding the Fourth Proportional to 71,775, 99,045.45 and 39,508.92

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Solution

The fourth proportional to 71,775, 99,045.45 and 39,508.92 is: 54,520.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,775 : 99,045.45 = 39,508.92 : x
  2. Step 2: Convert to fraction form
    71,775/99,045.45 = 39,508.92/x
  3. Step 3: Cross multiply
    71,775x = 99,045.45 × 39,508.92
  4. Step 4: Simplify right side
    71,775x = 3,913,178,760.41
  5. Step 5: Solve for x
    x = 3,913,178,760.41/71,775
  6. Step 6: Final answer
    x = 54,520.08

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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.