Home / 129,173.12-178,259.85-71,030.87

Finding the Fourth Proportional to 129,173.12, 178,259.85 and 71,030.87

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Solution

The fourth proportional to 129,173.12, 178,259.85 and 71,030.87 is: 98,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,173.12 : 178,259.85 = 71,030.87 : x
  2. Step 2: Convert to fraction form
    129,173.12/178,259.85 = 71,030.87/x
  3. Step 3: Cross multiply
    129,173.12x = 178,259.85 × 71,030.87
  4. Step 4: Simplify right side
    129,173.12x = 12,661,951,340.27
  5. Step 5: Solve for x
    x = 12,661,951,340.27/129,173.12
  6. Step 6: Final answer
    x = 98,023.12

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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.