Home / 129,056.78-178,140.12-83,654.66

Finding the Fourth Proportional to 129,056.78, 178,140.12 and 83,654.66

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Solution

The fourth proportional to 129,056.78, 178,140.12 and 83,654.66 is: 115,470.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,056.78 : 178,140.12 = 83,654.66 : x
  2. Step 2: Convert to fraction form
    129,056.78/178,140.12 = 83,654.66/x
  3. Step 3: Cross multiply
    129,056.78x = 178,140.12 × 83,654.66
  4. Step 4: Simplify right side
    129,056.78x = 14,902,251,170.96
  5. Step 5: Solve for x
    x = 14,902,251,170.96/129,056.78
  6. Step 6: Final answer
    x = 115,470.50

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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.