Home / 121,760.19-168,080.81-74,028.78

Finding the Fourth Proportional to 121,760.19, 168,080.81 and 74,028.78

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Solution

The fourth proportional to 121,760.19, 168,080.81 and 74,028.78 is: 102,191.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,760.19 : 168,080.81 = 74,028.78 : x
  2. Step 2: Convert to fraction form
    121,760.19/168,080.81 = 74,028.78/x
  3. Step 3: Cross multiply
    121,760.19x = 168,080.81 × 74,028.78
  4. Step 4: Simplify right side
    121,760.19x = 12,442,816,935.57
  5. Step 5: Solve for x
    x = 12,442,816,935.57/121,760.19
  6. Step 6: Final answer
    x = 102,191.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.