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Finding the Fourth Proportional to 60.98, 90.79 and 57.88

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Solution

The fourth proportional to 60.98, 90.79 and 57.88 is: 86.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.98 : 90.79 = 57.88 : x
  2. Step 2: Convert to fraction form
    60.98/90.79 = 57.88/x
  3. Step 3: Cross multiply
    60.98x = 90.79 × 57.88
  4. Step 4: Simplify right side
    60.98x = 5,254.47
  5. Step 5: Solve for x
    x = 5,254.47/60.98
  6. Step 6: Final answer
    x = 86.17

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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.