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Finding the Fourth Proportional to 91,281.92, 125,940.48 and 61,491.20

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Solution

The fourth proportional to 91,281.92, 125,940.48 and 61,491.20 is: 84,838.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,281.92 : 125,940.48 = 61,491.20 : x
  2. Step 2: Convert to fraction form
    91,281.92/125,940.48 = 61,491.20/x
  3. Step 3: Cross multiply
    91,281.92x = 125,940.48 × 61,491.20
  4. Step 4: Simplify right side
    91,281.92x = 7,744,231,243.78
  5. Step 5: Solve for x
    x = 7,744,231,243.78/91,281.92
  6. Step 6: Final answer
    x = 84,838.61

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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.