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Finding the Fourth Proportional to 71,086.95, 106,691.78 and 28,990.24

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Solution

The fourth proportional to 71,086.95, 106,691.78 and 28,990.24 is: 43,510.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,086.95 : 106,691.78 = 28,990.24 : x
  2. Step 2: Convert to fraction form
    71,086.95/106,691.78 = 28,990.24/x
  3. Step 3: Cross multiply
    71,086.95x = 106,691.78 × 28,990.24
  4. Step 4: Simplify right side
    71,086.95x = 3,093,020,113.97
  5. Step 5: Solve for x
    x = 3,093,020,113.97/71,086.95
  6. Step 6: Final answer
    x = 43,510.38

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1.5x scale

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.