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Finding the Fourth Proportional to 60.87, 91.26 and 45.66

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Solution

The fourth proportional to 60.87, 91.26 and 45.66 is: 68.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.87 : 91.26 = 45.66 : x
  2. Step 2: Convert to fraction form
    60.87/91.26 = 45.66/x
  3. Step 3: Cross multiply
    60.87x = 91.26 × 45.66
  4. Step 4: Simplify right side
    60.87x = 4,166.93
  5. Step 5: Solve for x
    x = 4,166.93/60.87
  6. Step 6: Final answer
    x = 68.46

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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.