Home / 121,921.20-182,525.40-86,929.20

Finding the Fourth Proportional to 121,921.20, 182,525.40 and 86,929.20

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Solution

The fourth proportional to 121,921.20, 182,525.40 and 86,929.20 is: 130,139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,921.20 : 182,525.40 = 86,929.20 : x
  2. Step 2: Convert to fraction form
    121,921.20/182,525.40 = 86,929.20/x
  3. Step 3: Cross multiply
    121,921.20x = 182,525.40 × 86,929.20
  4. Step 4: Simplify right side
    121,921.20x = 15,866,787,001.68
  5. Step 5: Solve for x
    x = 15,866,787,001.68/121,921.20
  6. Step 6: Final answer
    x = 130,139.69

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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.