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Finding the Fourth Proportional to 118,907.88, 178,391.52 and 83,915.88

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Solution

The fourth proportional to 118,907.88, 178,391.52 and 83,915.88 is: 125,894.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,907.88 : 178,391.52 = 83,915.88 : x
  2. Step 2: Convert to fraction form
    118,907.88/178,391.52 = 83,915.88/x
  3. Step 3: Cross multiply
    118,907.88x = 178,391.52 × 83,915.88
  4. Step 4: Simplify right side
    118,907.88x = 14,969,881,385.34
  5. Step 5: Solve for x
    x = 14,969,881,385.34/118,907.88
  6. Step 6: Final answer
    x = 125,894.78

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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.