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Finding the Fourth Proportional to 61.92, 93.48 and 60.72

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Solution

The fourth proportional to 61.92, 93.48 and 60.72 is: 91.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.92 : 93.48 = 60.72 : x
  2. Step 2: Convert to fraction form
    61.92/93.48 = 60.72/x
  3. Step 3: Cross multiply
    61.92x = 93.48 × 60.72
  4. Step 4: Simplify right side
    61.92x = 5,676.11
  5. Step 5: Solve for x
    x = 5,676.11/61.92
  6. Step 6: Final answer
    x = 91.67

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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.