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Finding the Fourth Proportional to 159.78, 239.54 and 63.50

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Solution

The fourth proportional to 159.78, 239.54 and 63.50 is: 95.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.78 : 239.54 = 63.50 : x
  2. Step 2: Convert to fraction form
    159.78/239.54 = 63.50/x
  3. Step 3: Cross multiply
    159.78x = 239.54 × 63.50
  4. Step 4: Simplify right side
    159.78x = 15,210.79
  5. Step 5: Solve for x
    x = 15,210.79/159.78
  6. Step 6: Final answer
    x = 95.20

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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.