Home / 129,042.45-178,107.05-71,701.48

Finding the Fourth Proportional to 129,042.45, 178,107.05 and 71,701.48

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Solution

The fourth proportional to 129,042.45, 178,107.05 and 71,701.48 is: 98,963.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,042.45 : 178,107.05 = 71,701.48 : x
  2. Step 2: Convert to fraction form
    129,042.45/178,107.05 = 71,701.48/x
  3. Step 3: Cross multiply
    129,042.45x = 178,107.05 × 71,701.48
  4. Step 4: Simplify right side
    129,042.45x = 12,770,538,984.40
  5. Step 5: Solve for x
    x = 12,770,538,984.40/129,042.45
  6. Step 6: Final answer
    x = 98,963.86

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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.