Home / 81,330.90-121,996.35-80,553.30

Finding the Fourth Proportional to 81,330.90, 121,996.35 and 80,553.30

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Solution

The fourth proportional to 81,330.90, 121,996.35 and 80,553.30 is: 120,829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,330.90 : 121,996.35 = 80,553.30 : x
  2. Step 2: Convert to fraction form
    81,330.90/121,996.35 = 80,553.30/x
  3. Step 3: Cross multiply
    81,330.90x = 121,996.35 × 80,553.30
  4. Step 4: Simplify right side
    81,330.90x = 9,827,208,580.46
  5. Step 5: Solve for x
    x = 9,827,208,580.46/81,330.90
  6. Step 6: Final answer
    x = 120,829.95

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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.