Home / 80,719.61-121,079.48-38,589.75

Finding the Fourth Proportional to 80,719.61, 121,079.48 and 38,589.75

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Solution

The fourth proportional to 80,719.61, 121,079.48 and 38,589.75 is: 57,884.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719.61 : 121,079.48 = 38,589.75 : x
  2. Step 2: Convert to fraction form
    80,719.61/121,079.48 = 38,589.75/x
  3. Step 3: Cross multiply
    80,719.61x = 121,079.48 × 38,589.75
  4. Step 4: Simplify right side
    80,719.61x = 4,672,426,670.38
  5. Step 5: Solve for x
    x = 4,672,426,670.38/80,719.61
  6. Step 6: Final answer
    x = 57,884.66

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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.