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Finding the Fourth Proportional to 60.45, 90.71 and 40.16

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Solution

The fourth proportional to 60.45, 90.71 and 40.16 is: 60.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.45 : 90.71 = 40.16 : x
  2. Step 2: Convert to fraction form
    60.45/90.71 = 40.16/x
  3. Step 3: Cross multiply
    60.45x = 90.71 × 40.16
  4. Step 4: Simplify right side
    60.45x = 3,642.26
  5. Step 5: Solve for x
    x = 3,642.26/60.45
  6. Step 6: Final answer
    x = 60.25

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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.