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Finding the Fourth Proportional to 268,687.62, 402,892.38 and 79,123.32

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Solution

The fourth proportional to 268,687.62, 402,892.38 and 79,123.32 is: 118,644.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,687.62 : 402,892.38 = 79,123.32 : x
  2. Step 2: Convert to fraction form
    268,687.62/402,892.38 = 79,123.32/x
  3. Step 3: Cross multiply
    268,687.62x = 402,892.38 × 79,123.32
  4. Step 4: Simplify right side
    268,687.62x = 31,878,182,708.30
  5. Step 5: Solve for x
    x = 31,878,182,708.30/268,687.62
  6. Step 6: Final answer
    x = 118,644.03

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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.