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Finding the Fourth Proportional to 118,748.80, 178,123.20 and 107,084.80

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Solution

The fourth proportional to 118,748.80, 178,123.20 and 107,084.80 is: 160,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,748.80 : 178,123.20 = 107,084.80 : x
  2. Step 2: Convert to fraction form
    118,748.80/178,123.20 = 107,084.80/x
  3. Step 3: Cross multiply
    118,748.80x = 178,123.20 × 107,084.80
  4. Step 4: Simplify right side
    118,748.80x = 19,074,287,247.36
  5. Step 5: Solve for x
    x = 19,074,287,247.36/118,748.80
  6. Step 6: Final answer
    x = 160,627.20

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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.