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Finding the Fourth Proportional to 71,565.72, 98,763.78 and 39,734.63

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Solution

The fourth proportional to 71,565.72, 98,763.78 and 39,734.63 is: 54,835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,565.72 : 98,763.78 = 39,734.63 : x
  2. Step 2: Convert to fraction form
    71,565.72/98,763.78 = 39,734.63/x
  3. Step 3: Cross multiply
    71,565.72x = 98,763.78 × 39,734.63
  4. Step 4: Simplify right side
    71,565.72x = 3,924,341,761.88
  5. Step 5: Solve for x
    x = 3,924,341,761.88/71,565.72
  6. Step 6: Final answer
    x = 54,835.50

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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.