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Finding the Fourth Proportional to 61,354.80, 84,723.30 and 38,734.20

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Solution

The fourth proportional to 61,354.80, 84,723.30 and 38,734.20 is: 53,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,354.80 : 84,723.30 = 38,734.20 : x
  2. Step 2: Convert to fraction form
    61,354.80/84,723.30 = 38,734.20/x
  3. Step 3: Cross multiply
    61,354.80x = 84,723.30 × 38,734.20
  4. Step 4: Simplify right side
    61,354.80x = 3,281,689,246.86
  5. Step 5: Solve for x
    x = 3,281,689,246.86/61,354.80
  6. Step 6: Final answer
    x = 53,487.08

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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.