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Finding the Fourth Proportional to 178,759.64, 268,135.34 and 89,989.30

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Solution

The fourth proportional to 178,759.64, 268,135.34 and 89,989.30 is: 134,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,759.64 : 268,135.34 = 89,989.30 : x
  2. Step 2: Convert to fraction form
    178,759.64/268,135.34 = 89,989.30/x
  3. Step 3: Cross multiply
    178,759.64x = 268,135.34 × 89,989.30
  4. Step 4: Simplify right side
    178,759.64x = 24,129,311,551.86
  5. Step 5: Solve for x
    x = 24,129,311,551.86/178,759.64
  6. Step 6: Final answer
    x = 134,981.88

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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.