Home / 129,221.55-178,325.67-72,632.91

Finding the Fourth Proportional to 129,221.55, 178,325.67 and 72,632.91

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Solution

The fourth proportional to 129,221.55, 178,325.67 and 72,632.91 is: 100,233.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,221.55 : 178,325.67 = 72,632.91 : x
  2. Step 2: Convert to fraction form
    129,221.55/178,325.67 = 72,632.91/x
  3. Step 3: Cross multiply
    129,221.55x = 178,325.67 × 72,632.91
  4. Step 4: Simplify right side
    129,221.55x = 12,952,312,339.80
  5. Step 5: Solve for x
    x = 12,952,312,339.80/129,221.55
  6. Step 6: Final answer
    x = 100,233.38

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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.