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Finding the Fourth Proportional to 101,691.25, 140,334.53 and 56,369.93

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Solution

The fourth proportional to 101,691.25, 140,334.53 and 56,369.93 is: 77,790.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,691.25 : 140,334.53 = 56,369.93 : x
  2. Step 2: Convert to fraction form
    101,691.25/140,334.53 = 56,369.93/x
  3. Step 3: Cross multiply
    101,691.25x = 140,334.53 × 56,369.93
  4. Step 4: Simplify right side
    101,691.25x = 7,910,646,649.16
  5. Step 5: Solve for x
    x = 7,910,646,649.16/101,691.25
  6. Step 6: Final answer
    x = 77,790.83

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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.