Home / 80,985.70-121,442.10-36,589.60

Finding the Fourth Proportional to 80,985.70, 121,442.10 and 36,589.60

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Solution

The fourth proportional to 80,985.70, 121,442.10 and 36,589.60 is: 54,867.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.70 : 121,442.10 = 36,589.60 : x
  2. Step 2: Convert to fraction form
    80,985.70/121,442.10 = 36,589.60/x
  3. Step 3: Cross multiply
    80,985.70x = 121,442.10 × 36,589.60
  4. Step 4: Simplify right side
    80,985.70x = 4,443,517,862.16
  5. Step 5: Solve for x
    x = 4,443,517,862.16/80,985.70
  6. Step 6: Final answer
    x = 54,867.93

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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.