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Finding the Fourth Proportional to 142,286.56, 213,552.54 and 79,169.74

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Solution

The fourth proportional to 142,286.56, 213,552.54 and 79,169.74 is: 118,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,286.56 : 213,552.54 = 79,169.74 : x
  2. Step 2: Convert to fraction form
    142,286.56/213,552.54 = 79,169.74/x
  3. Step 3: Cross multiply
    142,286.56x = 213,552.54 × 79,169.74
  4. Step 4: Simplify right side
    142,286.56x = 16,906,899,068.14
  5. Step 5: Solve for x
    x = 16,906,899,068.14/142,286.56
  6. Step 6: Final answer
    x = 118,822.88

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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.