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Finding the Fourth Proportional to 142,979.68, 214,330.06 and 68,079.70

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Solution

The fourth proportional to 142,979.68, 214,330.06 and 68,079.70 is: 102,053.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,979.68 : 214,330.06 = 68,079.70 : x
  2. Step 2: Convert to fraction form
    142,979.68/214,330.06 = 68,079.70/x
  3. Step 3: Cross multiply
    142,979.68x = 214,330.06 × 68,079.70
  4. Step 4: Simplify right side
    142,979.68x = 14,591,526,185.78
  5. Step 5: Solve for x
    x = 14,591,526,185.78/142,979.68
  6. Step 6: Final answer
    x = 102,053.15

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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.