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Finding the Fourth Proportional to 71.50, 107.21 and 59.95

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Solution

The fourth proportional to 71.50, 107.21 and 59.95 is: 89.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.50 : 107.21 = 59.95 : x
  2. Step 2: Convert to fraction form
    71.50/107.21 = 59.95/x
  3. Step 3: Cross multiply
    71.50x = 107.21 × 59.95
  4. Step 4: Simplify right side
    71.50x = 6,427.24
  5. Step 5: Solve for x
    x = 6,427.24/71.50
  6. Step 6: Final answer
    x = 89.89

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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.