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Finding the Fourth Proportional to 60.79, 91.22 and 45.60

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Solution

The fourth proportional to 60.79, 91.22 and 45.60 is: 68.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.79 : 91.22 = 45.60 : x
  2. Step 2: Convert to fraction form
    60.79/91.22 = 45.60/x
  3. Step 3: Cross multiply
    60.79x = 91.22 × 45.60
  4. Step 4: Simplify right side
    60.79x = 4,159.63
  5. Step 5: Solve for x
    x = 4,159.63/60.79
  6. Step 6: Final answer
    x = 68.43

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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.