Home / 81,046.23-121,585.11-31,122.66

Finding the Fourth Proportional to 81,046.23, 121,585.11 and 31,122.66

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Solution

The fourth proportional to 81,046.23, 121,585.11 and 31,122.66 is: 46,690.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,046.23 : 121,585.11 = 31,122.66 : x
  2. Step 2: Convert to fraction form
    81,046.23/121,585.11 = 31,122.66/x
  3. Step 3: Cross multiply
    81,046.23x = 121,585.11 × 31,122.66
  4. Step 4: Simplify right side
    81,046.23x = 3,784,051,883.98
  5. Step 5: Solve for x
    x = 3,784,051,883.98/81,046.23
  6. Step 6: Final answer
    x = 46,690.04

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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.