Home / 129,321.02-178,461.25-72,732.39

Finding the Fourth Proportional to 129,321.02, 178,461.25 and 72,732.39

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Solution

The fourth proportional to 129,321.02, 178,461.25 and 72,732.39 is: 100,369.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,321.02 : 178,461.25 = 72,732.39 : x
  2. Step 2: Convert to fraction form
    129,321.02/178,461.25 = 72,732.39/x
  3. Step 3: Cross multiply
    129,321.02x = 178,461.25 × 72,732.39
  4. Step 4: Simplify right side
    129,321.02x = 12,979,913,053.06
  5. Step 5: Solve for x
    x = 12,979,913,053.06/129,321.02
  6. Step 6: Final answer
    x = 100,369.71

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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.