Home / 81,000.24-121,541.37-54,649.65

Finding the Fourth Proportional to 81,000.24, 121,541.37 and 54,649.65

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Solution

The fourth proportional to 81,000.24, 121,541.37 and 54,649.65 is: 82,002.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.24 : 121,541.37 = 54,649.65 : x
  2. Step 2: Convert to fraction form
    81,000.24/121,541.37 = 54,649.65/x
  3. Step 3: Cross multiply
    81,000.24x = 121,541.37 × 54,649.65
  4. Step 4: Simplify right side
    81,000.24x = 6,642,193,331.02
  5. Step 5: Solve for x
    x = 6,642,193,331.02/81,000.24
  6. Step 6: Final answer
    x = 82,002.14

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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.