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Finding the Fourth Proportional to 98.88, 147.57 and 93.12

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Solution

The fourth proportional to 98.88, 147.57 and 93.12 is: 138.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.88 : 147.57 = 93.12 : x
  2. Step 2: Convert to fraction form
    98.88/147.57 = 93.12/x
  3. Step 3: Cross multiply
    98.88x = 147.57 × 93.12
  4. Step 4: Simplify right side
    98.88x = 13,741.72
  5. Step 5: Solve for x
    x = 13,741.72/98.88
  6. Step 6: Final answer
    x = 138.97

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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.