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Finding the Fourth Proportional to 95.39, 142.54 and 64.70

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Solution

The fourth proportional to 95.39, 142.54 and 64.70 is: 96.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.39 : 142.54 = 64.70 : x
  2. Step 2: Convert to fraction form
    95.39/142.54 = 64.70/x
  3. Step 3: Cross multiply
    95.39x = 142.54 × 64.70
  4. Step 4: Simplify right side
    95.39x = 9,222.34
  5. Step 5: Solve for x
    x = 9,222.34/95.39
  6. Step 6: Final answer
    x = 96.68

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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.