Home / 129,011.16-178,034.70-72,422.52

Finding the Fourth Proportional to 129,011.16, 178,034.70 and 72,422.52

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Solution

The fourth proportional to 129,011.16, 178,034.70 and 72,422.52 is: 99,942.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.16 : 178,034.70 = 72,422.52 : x
  2. Step 2: Convert to fraction form
    129,011.16/178,034.70 = 72,422.52/x
  3. Step 3: Cross multiply
    129,011.16x = 178,034.70 × 72,422.52
  4. Step 4: Simplify right side
    129,011.16x = 12,893,721,621.44
  5. Step 5: Solve for x
    x = 12,893,721,621.44/129,011.16
  6. Step 6: Final answer
    x = 99,942.68

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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.