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Finding the Fourth Proportional to 60.22, 90.19 and 40.87

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Solution

The fourth proportional to 60.22, 90.19 and 40.87 is: 61.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.22 : 90.19 = 40.87 : x
  2. Step 2: Convert to fraction form
    60.22/90.19 = 40.87/x
  3. Step 3: Cross multiply
    60.22x = 90.19 × 40.87
  4. Step 4: Simplify right side
    60.22x = 3,686.07
  5. Step 5: Solve for x
    x = 3,686.07/60.22
  6. Step 6: Final answer
    x = 61.21

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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.