Home / 129,363.38-178,520.73-72,775.22

Finding the Fourth Proportional to 129,363.38, 178,520.73 and 72,775.22

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Solution

The fourth proportional to 129,363.38, 178,520.73 and 72,775.22 is: 100,429.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,363.38 : 178,520.73 = 72,775.22 : x
  2. Step 2: Convert to fraction form
    129,363.38/178,520.73 = 72,775.22/x
  3. Step 3: Cross multiply
    129,363.38x = 178,520.73 × 72,775.22
  4. Step 4: Simplify right side
    129,363.38x = 12,991,885,400.31
  5. Step 5: Solve for x
    x = 12,991,885,400.31/129,363.38
  6. Step 6: Final answer
    x = 100,429.39

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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.