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Finding the Fourth Proportional to 85,862.55, 128,793.83 and 73,177.95

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Solution

The fourth proportional to 85,862.55, 128,793.83 and 73,177.95 is: 109,766.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,862.55 : 128,793.83 = 73,177.95 : x
  2. Step 2: Convert to fraction form
    85,862.55/128,793.83 = 73,177.95/x
  3. Step 3: Cross multiply
    85,862.55x = 128,793.83 × 73,177.95
  4. Step 4: Simplify right side
    85,862.55x = 9,424,868,086.16
  5. Step 5: Solve for x
    x = 9,424,868,086.16/85,862.55
  6. Step 6: Final answer
    x = 109,766.93

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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.