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Finding the Fourth Proportional to 92,290.80, 138,468.32 and 29,120.68

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Solution

The fourth proportional to 92,290.80, 138,468.32 and 29,120.68 is: 43,691.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,290.80 : 138,468.32 = 29,120.68 : x
  2. Step 2: Convert to fraction form
    92,290.80/138,468.32 = 29,120.68/x
  3. Step 3: Cross multiply
    92,290.80x = 138,468.32 × 29,120.68
  4. Step 4: Simplify right side
    92,290.80x = 4,032,291,636.86
  5. Step 5: Solve for x
    x = 4,032,291,636.86/92,290.80
  6. Step 6: Final answer
    x = 43,691.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.