Home / 81,104.13-121,656.20-41,639.31

Finding the Fourth Proportional to 81,104.13, 121,656.20 and 41,639.31

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Solution

The fourth proportional to 81,104.13, 121,656.20 and 41,639.31 is: 62,458.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.13 : 121,656.20 = 41,639.31 : x
  2. Step 2: Convert to fraction form
    81,104.13/121,656.20 = 41,639.31/x
  3. Step 3: Cross multiply
    81,104.13x = 121,656.20 × 41,639.31
  4. Step 4: Simplify right side
    81,104.13x = 5,065,680,017.03
  5. Step 5: Solve for x
    x = 5,065,680,017.03/81,104.13
  6. Step 6: Final answer
    x = 62,458.97

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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.