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Finding the Fourth Proportional to 91,710.61, 126,558 and 55,887.55

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Solution

The fourth proportional to 91,710.61, 126,558 and 55,887.55 is: 77,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,710.61 : 126,558 = 55,887.55 : x
  2. Step 2: Convert to fraction form
    91,710.61/126,558 = 55,887.55/x
  3. Step 3: Cross multiply
    91,710.61x = 126,558 × 55,887.55
  4. Step 4: Simplify right side
    91,710.61x = 7,073,016,552.90
  5. Step 5: Solve for x
    x = 7,073,016,552.90/91,710.61
  6. Step 6: Final answer
    x = 77,123.21

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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.