Home / 129,581.12-178,824.85-72,226.31

Finding the Fourth Proportional to 129,581.12, 178,824.85 and 72,226.31

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Solution

The fourth proportional to 129,581.12, 178,824.85 and 72,226.31 is: 99,673.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.12 : 178,824.85 = 72,226.31 : x
  2. Step 2: Convert to fraction form
    129,581.12/178,824.85 = 72,226.31/x
  3. Step 3: Cross multiply
    129,581.12x = 178,824.85 × 72,226.31
  4. Step 4: Simplify right side
    129,581.12x = 12,915,857,977.11
  5. Step 5: Solve for x
    x = 12,915,857,977.11/129,581.12
  6. Step 6: Final answer
    x = 99,673.92

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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.