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Finding the Fourth Proportional to 98.95, 137.18 and 93.48

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Solution

The fourth proportional to 98.95, 137.18 and 93.48 is: 129.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.95 : 137.18 = 93.48 : x
  2. Step 2: Convert to fraction form
    98.95/137.18 = 93.48/x
  3. Step 3: Cross multiply
    98.95x = 137.18 × 93.48
  4. Step 4: Simplify right side
    98.95x = 12,822.43
  5. Step 5: Solve for x
    x = 12,822.43/98.95
  6. Step 6: Final answer
    x = 129.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.