Home / 80,708.64-121,066.20-28,123.44

Finding the Fourth Proportional to 80,708.64, 121,066.20 and 28,123.44

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Solution

The fourth proportional to 80,708.64, 121,066.20 and 28,123.44 is: 42,186.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,708.64 : 121,066.20 = 28,123.44 : x
  2. Step 2: Convert to fraction form
    80,708.64/121,066.20 = 28,123.44/x
  3. Step 3: Cross multiply
    80,708.64x = 121,066.20 × 28,123.44
  4. Step 4: Simplify right side
    80,708.64x = 3,404,798,011.73
  5. Step 5: Solve for x
    x = 3,404,798,011.73/80,708.64
  6. Step 6: Final answer
    x = 42,186.29

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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.