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Finding the Fourth Proportional to 177,943.80, 266,915.70 and 138,286.20

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Solution

The fourth proportional to 177,943.80, 266,915.70 and 138,286.20 is: 207,429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,943.80 : 266,915.70 = 138,286.20 : x
  2. Step 2: Convert to fraction form
    177,943.80/266,915.70 = 138,286.20/x
  3. Step 3: Cross multiply
    177,943.80x = 266,915.70 × 138,286.20
  4. Step 4: Simplify right side
    177,943.80x = 36,910,757,873.34
  5. Step 5: Solve for x
    x = 36,910,757,873.34/177,943.80
  6. Step 6: Final answer
    x = 207,429.30

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1.5x scale

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.