Home / 121,869.20-182,447.40-86,877.20

Finding the Fourth Proportional to 121,869.20, 182,447.40 and 86,877.20

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Solution

The fourth proportional to 121,869.20, 182,447.40 and 86,877.20 is: 130,061.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,869.20 : 182,447.40 = 86,877.20 : x
  2. Step 2: Convert to fraction form
    121,869.20/182,447.40 = 86,877.20/x
  3. Step 3: Cross multiply
    121,869.20x = 182,447.40 × 86,877.20
  4. Step 4: Simplify right side
    121,869.20x = 15,850,519,259.28
  5. Step 5: Solve for x
    x = 15,850,519,259.28/121,869.20
  6. Step 6: Final answer
    x = 130,061.73

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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.