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Finding the Fourth Proportional to 71,618.46, 106,901.99 and 66,340.50

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Solution

The fourth proportional to 71,618.46, 106,901.99 and 66,340.50 is: 99,023.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,618.46 : 106,901.99 = 66,340.50 : x
  2. Step 2: Convert to fraction form
    71,618.46/106,901.99 = 66,340.50/x
  3. Step 3: Cross multiply
    71,618.46x = 106,901.99 × 66,340.50
  4. Step 4: Simplify right side
    71,618.46x = 7,091,931,135.89
  5. Step 5: Solve for x
    x = 7,091,931,135.89/71,618.46
  6. Step 6: Final answer
    x = 99,023.79

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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.