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Finding the Fourth Proportional to 71.05, 98.02 and 43.40

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Solution

The fourth proportional to 71.05, 98.02 and 43.40 is: 59.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.05 : 98.02 = 43.40 : x
  2. Step 2: Convert to fraction form
    71.05/98.02 = 43.40/x
  3. Step 3: Cross multiply
    71.05x = 98.02 × 43.40
  4. Step 4: Simplify right side
    71.05x = 4,253.85
  5. Step 5: Solve for x
    x = 4,253.85/71.05
  6. Step 6: Final answer
    x = 59.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.