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Finding the Fourth Proportional to 78,691.38, 108,590.69 and 44,699.76

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Solution

The fourth proportional to 78,691.38, 108,590.69 and 44,699.76 is: 61,683.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.38 : 108,590.69 = 44,699.76 : x
  2. Step 2: Convert to fraction form
    78,691.38/108,590.69 = 44,699.76/x
  3. Step 3: Cross multiply
    78,691.38x = 108,590.69 × 44,699.76
  4. Step 4: Simplify right side
    78,691.38x = 4,853,977,781.23
  5. Step 5: Solve for x
    x = 4,853,977,781.23/78,691.38
  6. Step 6: Final answer
    x = 61,683.73

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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.