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Finding the Fourth Proportional to 74.79, 112.59 and 60.48

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Solution

The fourth proportional to 74.79, 112.59 and 60.48 is: 91.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.79 : 112.59 = 60.48 : x
  2. Step 2: Convert to fraction form
    74.79/112.59 = 60.48/x
  3. Step 3: Cross multiply
    74.79x = 112.59 × 60.48
  4. Step 4: Simplify right side
    74.79x = 6,809.44
  5. Step 5: Solve for x
    x = 6,809.44/74.79
  6. Step 6: Final answer
    x = 91.05

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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.