Home / 129,621.35-178,871.25-72,266.97

Finding the Fourth Proportional to 129,621.35, 178,871.25 and 72,266.97

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Solution

The fourth proportional to 129,621.35, 178,871.25 and 72,266.97 is: 99,724.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,621.35 : 178,871.25 = 72,266.97 : x
  2. Step 2: Convert to fraction form
    129,621.35/178,871.25 = 72,266.97/x
  3. Step 3: Cross multiply
    129,621.35x = 178,871.25 × 72,266.97
  4. Step 4: Simplify right side
    129,621.35x = 12,926,483,257.61
  5. Step 5: Solve for x
    x = 12,926,483,257.61/129,621.35
  6. Step 6: Final answer
    x = 99,724.95

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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.