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Finding the Fourth Proportional to 78.95, 118 and 60.73

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Solution

The fourth proportional to 78.95, 118 and 60.73 is: 90.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.95 : 118 = 60.73 : x
  2. Step 2: Convert to fraction form
    78.95/118 = 60.73/x
  3. Step 3: Cross multiply
    78.95x = 118 × 60.73
  4. Step 4: Simplify right side
    78.95x = 7,166.14
  5. Step 5: Solve for x
    x = 7,166.14/78.95
  6. Step 6: Final answer
    x = 90.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.