Home / 129,524.72-178,731.90-72,158.22

Finding the Fourth Proportional to 129,524.72, 178,731.90 and 72,158.22

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Solution

The fourth proportional to 129,524.72, 178,731.90 and 72,158.22 is: 99,571.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,524.72 : 178,731.90 = 72,158.22 : x
  2. Step 2: Convert to fraction form
    129,524.72/178,731.90 = 72,158.22/x
  3. Step 3: Cross multiply
    129,524.72x = 178,731.90 × 72,158.22
  4. Step 4: Simplify right side
    129,524.72x = 12,896,975,761.22
  5. Step 5: Solve for x
    x = 12,896,975,761.22/129,524.72
  6. Step 6: Final answer
    x = 99,571.54

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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.