Home / 129,238.04-178,358.28-72,657.92

Finding the Fourth Proportional to 129,238.04, 178,358.28 and 72,657.92

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Solution

The fourth proportional to 129,238.04, 178,358.28 and 72,657.92 is: 100,273.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,238.04 : 178,358.28 = 72,657.92 : x
  2. Step 2: Convert to fraction form
    129,238.04/178,358.28 = 72,657.92/x
  3. Step 3: Cross multiply
    129,238.04x = 178,358.28 × 72,657.92
  4. Step 4: Simplify right side
    129,238.04x = 12,959,141,639.58
  5. Step 5: Solve for x
    x = 12,959,141,639.58/129,238.04
  6. Step 6: Final answer
    x = 100,273.43

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1.5x scale

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.