Home / 121,539.60-182,417.40-71,557.20

Finding the Fourth Proportional to 121,539.60, 182,417.40 and 71,557.20

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Solution

The fourth proportional to 121,539.60, 182,417.40 and 71,557.20 is: 107,399.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,539.60 : 182,417.40 = 71,557.20 : x
  2. Step 2: Convert to fraction form
    121,539.60/182,417.40 = 71,557.20/x
  3. Step 3: Cross multiply
    121,539.60x = 182,417.40 × 71,557.20
  4. Step 4: Simplify right side
    121,539.60x = 13,053,278,375.28
  5. Step 5: Solve for x
    x = 13,053,278,375.28/121,539.60
  6. Step 6: Final answer
    x = 107,399.39

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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.