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Finding the Fourth Proportional to 167,987.60, 251,981.40 and 89,061.20

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Solution

The fourth proportional to 167,987.60, 251,981.40 and 89,061.20 is: 133,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,987.60 : 251,981.40 = 89,061.20 : x
  2. Step 2: Convert to fraction form
    167,987.60/251,981.40 = 89,061.20/x
  3. Step 3: Cross multiply
    167,987.60x = 251,981.40 × 89,061.20
  4. Step 4: Simplify right side
    167,987.60x = 22,441,765,861.68
  5. Step 5: Solve for x
    x = 22,441,765,861.68/167,987.60
  6. Step 6: Final answer
    x = 133,591.80

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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.