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Finding the Fourth Proportional to 133,138.68, 183,687.12 and 87,839.16

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Solution

The fourth proportional to 133,138.68, 183,687.12 and 87,839.16 is: 121,188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,138.68 : 183,687.12 = 87,839.16 : x
  2. Step 2: Convert to fraction form
    133,138.68/183,687.12 = 87,839.16/x
  3. Step 3: Cross multiply
    133,138.68x = 183,687.12 × 87,839.16
  4. Step 4: Simplify right side
    133,138.68x = 16,134,922,323.62
  5. Step 5: Solve for x
    x = 16,134,922,323.62/133,138.68
  6. Step 6: Final answer
    x = 121,188.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.