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Finding the Fourth Proportional to 160.66, 240.78 and 69.45

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Solution

The fourth proportional to 160.66, 240.78 and 69.45 is: 104.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.66 : 240.78 = 69.45 : x
  2. Step 2: Convert to fraction form
    160.66/240.78 = 69.45/x
  3. Step 3: Cross multiply
    160.66x = 240.78 × 69.45
  4. Step 4: Simplify right side
    160.66x = 16,722.17
  5. Step 5: Solve for x
    x = 16,722.17/160.66
  6. Step 6: Final answer
    x = 104.08

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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.