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Finding the Fourth Proportional to 96.42, 143.90 and 93.42

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Solution

The fourth proportional to 96.42, 143.90 and 93.42 is: 139.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.42 : 143.90 = 93.42 : x
  2. Step 2: Convert to fraction form
    96.42/143.90 = 93.42/x
  3. Step 3: Cross multiply
    96.42x = 143.90 × 93.42
  4. Step 4: Simplify right side
    96.42x = 13,442.67
  5. Step 5: Solve for x
    x = 13,442.67/96.42
  6. Step 6: Final answer
    x = 139.42

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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.