Home / 129,147.55-178,222.41-71,785.37

Finding the Fourth Proportional to 129,147.55, 178,222.41 and 71,785.37

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Solution

The fourth proportional to 129,147.55, 178,222.41 and 71,785.37 is: 99,063.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,147.55 : 178,222.41 = 71,785.37 : x
  2. Step 2: Convert to fraction form
    129,147.55/178,222.41 = 71,785.37/x
  3. Step 3: Cross multiply
    129,147.55x = 178,222.41 × 71,785.37
  4. Step 4: Simplify right side
    129,147.55x = 12,793,762,089.70
  5. Step 5: Solve for x
    x = 12,793,762,089.70/129,147.55
  6. Step 6: Final answer
    x = 99,063.14

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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.