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Finding the Fourth Proportional to 97.77, 146.60 and 42.92

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Solution

The fourth proportional to 97.77, 146.60 and 42.92 is: 64.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.77 : 146.60 = 42.92 : x
  2. Step 2: Convert to fraction form
    97.77/146.60 = 42.92/x
  3. Step 3: Cross multiply
    97.77x = 146.60 × 42.92
  4. Step 4: Simplify right side
    97.77x = 6,292.50
  5. Step 5: Solve for x
    x = 6,292.50/97.77
  6. Step 6: Final answer
    x = 64.36

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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.