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Finding the Fourth Proportional to 83,906.90, 125,860.35 and 80,681.30

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Solution

The fourth proportional to 83,906.90, 125,860.35 and 80,681.30 is: 121,021.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,906.90 : 125,860.35 = 80,681.30 : x
  2. Step 2: Convert to fraction form
    83,906.90/125,860.35 = 80,681.30/x
  3. Step 3: Cross multiply
    83,906.90x = 125,860.35 × 80,681.30
  4. Step 4: Simplify right side
    83,906.90x = 10,154,576,656.46
  5. Step 5: Solve for x
    x = 10,154,576,656.46/83,906.90
  6. Step 6: Final answer
    x = 121,021.95

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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.