Home / 129,323.28-178,467.76-72,734.66

Finding the Fourth Proportional to 129,323.28, 178,467.76 and 72,734.66

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Solution

The fourth proportional to 129,323.28, 178,467.76 and 72,734.66 is: 100,374.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,323.28 : 178,467.76 = 72,734.66 : x
  2. Step 2: Convert to fraction form
    129,323.28/178,467.76 = 72,734.66/x
  3. Step 3: Cross multiply
    129,323.28x = 178,467.76 × 72,734.66
  4. Step 4: Simplify right side
    129,323.28x = 12,980,791,844.56
  5. Step 5: Solve for x
    x = 12,980,791,844.56/129,323.28
  6. Step 6: Final answer
    x = 100,374.75

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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.