Home / 129,511.28-178,728.84-72,924.56

Finding the Fourth Proportional to 129,511.28, 178,728.84 and 72,924.56

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Solution

The fourth proportional to 129,511.28, 178,728.84 and 72,924.56 is: 100,637.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,511.28 : 178,728.84 = 72,924.56 : x
  2. Step 2: Convert to fraction form
    129,511.28/178,728.84 = 72,924.56/x
  3. Step 3: Cross multiply
    129,511.28x = 178,728.84 × 72,924.56
  4. Step 4: Simplify right side
    129,511.28x = 13,033,722,016.31
  5. Step 5: Solve for x
    x = 13,033,722,016.31/129,511.28
  6. Step 6: Final answer
    x = 100,637.74

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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.