Home / 81,723.40-122,585.10-31,805.80

Finding the Fourth Proportional to 81,723.40, 122,585.10 and 31,805.80

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Solution

The fourth proportional to 81,723.40, 122,585.10 and 31,805.80 is: 47,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,723.40 : 122,585.10 = 31,805.80 : x
  2. Step 2: Convert to fraction form
    81,723.40/122,585.10 = 31,805.80/x
  3. Step 3: Cross multiply
    81,723.40x = 122,585.10 × 31,805.80
  4. Step 4: Simplify right side
    81,723.40x = 3,898,917,173.58
  5. Step 5: Solve for x
    x = 3,898,917,173.58/81,723.40
  6. Step 6: Final answer
    x = 47,708.70

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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.