Home / 121,329.20-181,799.40-76,876.40

Finding the Fourth Proportional to 121,329.20, 181,799.40 and 76,876.40

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Solution

The fourth proportional to 121,329.20, 181,799.40 and 76,876.40 is: 115,191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,329.20 : 181,799.40 = 76,876.40 : x
  2. Step 2: Convert to fraction form
    121,329.20/181,799.40 = 76,876.40/x
  3. Step 3: Cross multiply
    121,329.20x = 181,799.40 × 76,876.40
  4. Step 4: Simplify right side
    121,329.20x = 13,976,083,394.16
  5. Step 5: Solve for x
    x = 13,976,083,394.16/121,329.20
  6. Step 6: Final answer
    x = 115,191.42

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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.