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Finding the Fourth Proportional to 71,618.59, 106,902.18 and 66,340.63

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Solution

The fourth proportional to 71,618.59, 106,902.18 and 66,340.63 is: 99,023.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,618.59 : 106,902.18 = 66,340.63 : x
  2. Step 2: Convert to fraction form
    71,618.59/106,902.18 = 66,340.63/x
  3. Step 3: Cross multiply
    71,618.59x = 106,902.18 × 66,340.63
  4. Step 4: Simplify right side
    71,618.59x = 7,091,957,103.36
  5. Step 5: Solve for x
    x = 7,091,957,103.36/71,618.59
  6. Step 6: Final answer
    x = 99,023.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.