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Finding the Fourth Proportional to 97.90, 146.64 and 94.12

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Solution

The fourth proportional to 97.90, 146.64 and 94.12 is: 140.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.90 : 146.64 = 94.12 : x
  2. Step 2: Convert to fraction form
    97.90/146.64 = 94.12/x
  3. Step 3: Cross multiply
    97.90x = 146.64 × 94.12
  4. Step 4: Simplify right side
    97.90x = 13,801.76
  5. Step 5: Solve for x
    x = 13,801.76/97.90
  6. Step 6: Final answer
    x = 140.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.