Home / 121,127.60-181,799.40-71,145.20

Finding the Fourth Proportional to 121,127.60, 181,799.40 and 71,145.20

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Solution

The fourth proportional to 121,127.60, 181,799.40 and 71,145.20 is: 106,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,127.60 : 181,799.40 = 71,145.20 : x
  2. Step 2: Convert to fraction form
    121,127.60/181,799.40 = 71,145.20/x
  3. Step 3: Cross multiply
    121,127.60x = 181,799.40 × 71,145.20
  4. Step 4: Simplify right side
    121,127.60x = 12,934,154,672.88
  5. Step 5: Solve for x
    x = 12,934,154,672.88/121,127.60
  6. Step 6: Final answer
    x = 106,781.23

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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.