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Finding the Fourth Proportional to 91,321.92, 125,989.52 and 67,505.76

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Solution

The fourth proportional to 91,321.92, 125,989.52 and 67,505.76 is: 93,132.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,321.92 : 125,989.52 = 67,505.76 : x
  2. Step 2: Convert to fraction form
    91,321.92/125,989.52 = 67,505.76/x
  3. Step 3: Cross multiply
    91,321.92x = 125,989.52 × 67,505.76
  4. Step 4: Simplify right side
    91,321.92x = 8,505,018,299.64
  5. Step 5: Solve for x
    x = 8,505,018,299.64/91,321.92
  6. Step 6: Final answer
    x = 93,132.28

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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.