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Finding the Fourth Proportional to 98,915.65, 148,217.87 and 76,481.13

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Solution

The fourth proportional to 98,915.65, 148,217.87 and 76,481.13 is: 114,601.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,915.65 : 148,217.87 = 76,481.13 : x
  2. Step 2: Convert to fraction form
    98,915.65/148,217.87 = 76,481.13/x
  3. Step 3: Cross multiply
    98,915.65x = 148,217.87 × 76,481.13
  4. Step 4: Simplify right side
    98,915.65x = 11,335,870,375.00
  5. Step 5: Solve for x
    x = 11,335,870,375.00/98,915.65
  6. Step 6: Final answer
    x = 114,601.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.