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Finding the Fourth Proportional to 60.50, 91.10 and 45.36

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Solution

The fourth proportional to 60.50, 91.10 and 45.36 is: 68.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.50 : 91.10 = 45.36 : x
  2. Step 2: Convert to fraction form
    60.50/91.10 = 45.36/x
  3. Step 3: Cross multiply
    60.50x = 91.10 × 45.36
  4. Step 4: Simplify right side
    60.50x = 4,132.41
  5. Step 5: Solve for x
    x = 4,132.41/60.50
  6. Step 6: Final answer
    x = 68.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.