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Finding the Fourth Proportional to 118,775.54, 177,915.42 and 71,239.88

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Solution

The fourth proportional to 118,775.54, 177,915.42 and 71,239.88 is: 106,711.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,775.54 : 177,915.42 = 71,239.88 : x
  2. Step 2: Convert to fraction form
    118,775.54/177,915.42 = 71,239.88/x
  3. Step 3: Cross multiply
    118,775.54x = 177,915.42 × 71,239.88
  4. Step 4: Simplify right side
    118,775.54x = 12,674,673,170.95
  5. Step 5: Solve for x
    x = 12,674,673,170.95/118,775.54
  6. Step 6: Final answer
    x = 106,711.14

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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.