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Finding the Fourth Proportional to 99.48, 148.23 and 93.39

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Solution

The fourth proportional to 99.48, 148.23 and 93.39 is: 139.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.48 : 148.23 = 93.39 : x
  2. Step 2: Convert to fraction form
    99.48/148.23 = 93.39/x
  3. Step 3: Cross multiply
    99.48x = 148.23 × 93.39
  4. Step 4: Simplify right side
    99.48x = 13,843.20
  5. Step 5: Solve for x
    x = 13,843.20/99.48
  6. Step 6: Final answer
    x = 139.16

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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.