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Finding the Fourth Proportional to 61.05, 91.08 and 59.73

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Solution

The fourth proportional to 61.05, 91.08 and 59.73 is: 89.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.05 : 91.08 = 59.73 : x
  2. Step 2: Convert to fraction form
    61.05/91.08 = 59.73/x
  3. Step 3: Cross multiply
    61.05x = 91.08 × 59.73
  4. Step 4: Simplify right side
    61.05x = 5,440.21
  5. Step 5: Solve for x
    x = 5,440.21/61.05
  6. Step 6: Final answer
    x = 89.11

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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.