Home / 120,948.40-166,845-71,862.04

Finding the Fourth Proportional to 120,948.40, 166,845 and 71,862.04

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Solution

The fourth proportional to 120,948.40, 166,845 and 71,862.04 is: 99,131.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,948.40 : 166,845 = 71,862.04 : x
  2. Step 2: Convert to fraction form
    120,948.40/166,845 = 71,862.04/x
  3. Step 3: Cross multiply
    120,948.40x = 166,845 × 71,862.04
  4. Step 4: Simplify right side
    120,948.40x = 11,989,822,063.80
  5. Step 5: Solve for x
    x = 11,989,822,063.80/120,948.40
  6. Step 6: Final answer
    x = 99,131.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.