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Finding the Fourth Proportional to 102,660.43, 153,990.58 and 74,757.98

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Solution

The fourth proportional to 102,660.43, 153,990.58 and 74,757.98 is: 112,136.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,660.43 : 153,990.58 = 74,757.98 : x
  2. Step 2: Convert to fraction form
    102,660.43/153,990.58 = 74,757.98/x
  3. Step 3: Cross multiply
    102,660.43x = 153,990.58 × 74,757.98
  4. Step 4: Simplify right side
    102,660.43x = 11,512,024,857.53
  5. Step 5: Solve for x
    x = 11,512,024,857.53/102,660.43
  6. Step 6: Final answer
    x = 112,136.93

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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.