Home / 136,966.80-205,445.88-81,189.12

Finding the Fourth Proportional to 136,966.80, 205,445.88 and 81,189.12

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Solution

The fourth proportional to 136,966.80, 205,445.88 and 81,189.12 is: 121,781.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,966.80 : 205,445.88 = 81,189.12 : x
  2. Step 2: Convert to fraction form
    136,966.80/205,445.88 = 81,189.12/x
  3. Step 3: Cross multiply
    136,966.80x = 205,445.88 × 81,189.12
  4. Step 4: Simplify right side
    136,966.80x = 16,679,970,204.83
  5. Step 5: Solve for x
    x = 16,679,970,204.83/136,966.80
  6. Step 6: Final answer
    x = 121,781.12

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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.