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Finding the Fourth Proportional to 95.79, 132.15 and 64.74

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Solution

The fourth proportional to 95.79, 132.15 and 64.74 is: 89.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.79 : 132.15 = 64.74 : x
  2. Step 2: Convert to fraction form
    95.79/132.15 = 64.74/x
  3. Step 3: Cross multiply
    95.79x = 132.15 × 64.74
  4. Step 4: Simplify right side
    95.79x = 8,555.39
  5. Step 5: Solve for x
    x = 8,555.39/95.79
  6. Step 6: Final answer
    x = 89.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.