Home / 129,043.92-178,080.48-72,455.52

Finding the Fourth Proportional to 129,043.92, 178,080.48 and 72,455.52

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Solution

The fourth proportional to 129,043.92, 178,080.48 and 72,455.52 is: 99,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,043.92 : 178,080.48 = 72,455.52 : x
  2. Step 2: Convert to fraction form
    129,043.92/178,080.48 = 72,455.52/x
  3. Step 3: Cross multiply
    129,043.92x = 178,080.48 × 72,455.52
  4. Step 4: Simplify right side
    129,043.92x = 12,902,913,780.25
  5. Step 5: Solve for x
    x = 12,902,913,780.25/129,043.92
  6. Step 6: Final answer
    x = 99,988.54

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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.