Home / 129,042.12-178,092.48-75,340.44

Finding the Fourth Proportional to 129,042.12, 178,092.48 and 75,340.44

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Solution

The fourth proportional to 129,042.12, 178,092.48 and 75,340.44 is: 103,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,042.12 : 178,092.48 = 75,340.44 : x
  2. Step 2: Convert to fraction form
    129,042.12/178,092.48 = 75,340.44/x
  3. Step 3: Cross multiply
    129,042.12x = 178,092.48 × 75,340.44
  4. Step 4: Simplify right side
    129,042.12x = 13,417,565,803.89
  5. Step 5: Solve for x
    x = 13,417,565,803.89/129,042.12
  6. Step 6: Final answer
    x = 103,978.19

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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.