Home / 80,836.24-121,175-38,704.40

Finding the Fourth Proportional to 80,836.24, 121,175 and 38,704.40

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Solution

The fourth proportional to 80,836.24, 121,175 and 38,704.40 is: 58,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,836.24 : 121,175 = 38,704.40 : x
  2. Step 2: Convert to fraction form
    80,836.24/121,175 = 38,704.40/x
  3. Step 3: Cross multiply
    80,836.24x = 121,175 × 38,704.40
  4. Step 4: Simplify right side
    80,836.24x = 4,690,005,670
  5. Step 5: Solve for x
    x = 4,690,005,670/80,836.24
  6. Step 6: Final answer
    x = 58,018.60

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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.