Home / 81,042.68-121,583.46-31,123.19

Finding the Fourth Proportional to 81,042.68, 121,583.46 and 31,123.19

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Solution

The fourth proportional to 81,042.68, 121,583.46 and 31,123.19 is: 46,692.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,042.68 : 121,583.46 = 31,123.19 : x
  2. Step 2: Convert to fraction form
    81,042.68/121,583.46 = 31,123.19/x
  3. Step 3: Cross multiply
    81,042.68x = 121,583.46 × 31,123.19
  4. Step 4: Simplify right side
    81,042.68x = 3,784,065,126.44
  5. Step 5: Solve for x
    x = 3,784,065,126.44/81,042.68
  6. Step 6: Final answer
    x = 46,692.25

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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.