Home / 137,187.28-206,809.12-128,042.88

Finding the Fourth Proportional to 137,187.28, 206,809.12 and 128,042.88

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Solution

The fourth proportional to 137,187.28, 206,809.12 and 128,042.88 is: 193,023.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,187.28 : 206,809.12 = 128,042.88 : x
  2. Step 2: Convert to fraction form
    137,187.28/206,809.12 = 128,042.88/x
  3. Step 3: Cross multiply
    137,187.28x = 206,809.12 × 128,042.88
  4. Step 4: Simplify right side
    137,187.28x = 26,480,435,335.07
  5. Step 5: Solve for x
    x = 26,480,435,335.07/137,187.28
  6. Step 6: Final answer
    x = 193,023.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.