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Finding the Fourth Proportional to 133,129.59, 183,742.57 and 78,679.52

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Solution

The fourth proportional to 133,129.59, 183,742.57 and 78,679.52 is: 108,591.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,129.59 : 183,742.57 = 78,679.52 : x
  2. Step 2: Convert to fraction form
    133,129.59/183,742.57 = 78,679.52/x
  3. Step 3: Cross multiply
    133,129.59x = 183,742.57 × 78,679.52
  4. Step 4: Simplify right side
    133,129.59x = 14,456,777,211.17
  5. Step 5: Solve for x
    x = 14,456,777,211.17/133,129.59
  6. Step 6: Final answer
    x = 108,591.77

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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.