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Finding the Fourth Proportional to 159.95, 240.06 and 68.72

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Solution

The fourth proportional to 159.95, 240.06 and 68.72 is: 103.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.95 : 240.06 = 68.72 : x
  2. Step 2: Convert to fraction form
    159.95/240.06 = 68.72/x
  3. Step 3: Cross multiply
    159.95x = 240.06 × 68.72
  4. Step 4: Simplify right side
    159.95x = 16,495.72
  5. Step 5: Solve for x
    x = 16,495.72/159.95
  6. Step 6: Final answer
    x = 103.13

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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.