Home / 454,305.40-681,458.10-138,761.80

Finding the Fourth Proportional to 454,305.40, 681,458.10 and 138,761.80

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Solution

The fourth proportional to 454,305.40, 681,458.10 and 138,761.80 is: 208,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,305.40 : 681,458.10 = 138,761.80 : x
  2. Step 2: Convert to fraction form
    454,305.40/681,458.10 = 138,761.80/x
  3. Step 3: Cross multiply
    454,305.40x = 681,458.10 × 138,761.80
  4. Step 4: Simplify right side
    454,305.40x = 94,560,352,580.58
  5. Step 5: Solve for x
    x = 94,560,352,580.58/454,305.40
  6. Step 6: Final answer
    x = 208,142.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.