Home / 129,425.26-178,577.31-72,815.98

Finding the Fourth Proportional to 129,425.26, 178,577.31 and 72,815.98

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Solution

The fourth proportional to 129,425.26, 178,577.31 and 72,815.98 is: 100,469.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,425.26 : 178,577.31 = 72,815.98 : x
  2. Step 2: Convert to fraction form
    129,425.26/178,577.31 = 72,815.98/x
  3. Step 3: Cross multiply
    129,425.26x = 178,577.31 × 72,815.98
  4. Step 4: Simplify right side
    129,425.26x = 13,003,281,833.41
  5. Step 5: Solve for x
    x = 13,003,281,833.41/129,425.26
  6. Step 6: Final answer
    x = 100,469.43

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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.