Home / 80,485.38-120,752.79-38,419.14

Finding the Fourth Proportional to 80,485.38, 120,752.79 and 38,419.14

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Solution

The fourth proportional to 80,485.38, 120,752.79 and 38,419.14 is: 57,640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.38 : 120,752.79 = 38,419.14 : x
  2. Step 2: Convert to fraction form
    80,485.38/120,752.79 = 38,419.14/x
  3. Step 3: Cross multiply
    80,485.38x = 120,752.79 × 38,419.14
  4. Step 4: Simplify right side
    80,485.38x = 4,639,218,344.40
  5. Step 5: Solve for x
    x = 4,639,218,344.40/80,485.38
  6. Step 6: Final answer
    x = 57,640.51

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1.5x scale

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.