Home / 129,339.18-178,485.17-71,976.90

Finding the Fourth Proportional to 129,339.18, 178,485.17 and 71,976.90

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Solution

The fourth proportional to 129,339.18, 178,485.17 and 71,976.90 is: 99,326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,339.18 : 178,485.17 = 71,976.90 : x
  2. Step 2: Convert to fraction form
    129,339.18/178,485.17 = 71,976.90/x
  3. Step 3: Cross multiply
    129,339.18x = 178,485.17 × 71,976.90
  4. Step 4: Simplify right side
    129,339.18x = 12,846,809,946.88
  5. Step 5: Solve for x
    x = 12,846,809,946.88/129,339.18
  6. Step 6: Final answer
    x = 99,326.51

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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.