Home / 129,208.88-178,304.10-71,847.92

Finding the Fourth Proportional to 129,208.88, 178,304.10 and 71,847.92

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Solution

The fourth proportional to 129,208.88, 178,304.10 and 71,847.92 is: 99,147.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,208.88 : 178,304.10 = 71,847.92 : x
  2. Step 2: Convert to fraction form
    129,208.88/178,304.10 = 71,847.92/x
  3. Step 3: Cross multiply
    129,208.88x = 178,304.10 × 71,847.92
  4. Step 4: Simplify right side
    129,208.88x = 12,810,778,712.47
  5. Step 5: Solve for x
    x = 12,810,778,712.47/129,208.88
  6. Step 6: Final answer
    x = 99,147.82

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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.