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Finding the Fourth Proportional to 91,149.45, 125,752.98 and 56,691.90

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Solution

The fourth proportional to 91,149.45, 125,752.98 and 56,691.90 is: 78,214.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,149.45 : 125,752.98 = 56,691.90 : x
  2. Step 2: Convert to fraction form
    91,149.45/125,752.98 = 56,691.90/x
  3. Step 3: Cross multiply
    91,149.45x = 125,752.98 × 56,691.90
  4. Step 4: Simplify right side
    91,149.45x = 7,129,175,366.86
  5. Step 5: Solve for x
    x = 7,129,175,366.86/91,149.45
  6. Step 6: Final answer
    x = 78,214.13

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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.