Home / 80,639.70-121,023.53-43,227.42

Finding the Fourth Proportional to 80,639.70, 121,023.53 and 43,227.42

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Solution

The fourth proportional to 80,639.70, 121,023.53 and 43,227.42 is: 64,875.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639.70 : 121,023.53 = 43,227.42 : x
  2. Step 2: Convert to fraction form
    80,639.70/121,023.53 = 43,227.42/x
  3. Step 3: Cross multiply
    80,639.70x = 121,023.53 × 43,227.42
  4. Step 4: Simplify right side
    80,639.70x = 5,231,534,961.19
  5. Step 5: Solve for x
    x = 5,231,534,961.19/80,639.70
  6. Step 6: Final answer
    x = 64,875.43

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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.