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Finding the Fourth Proportional to 160.49, 240.40 and 73.90

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Solution

The fourth proportional to 160.49, 240.40 and 73.90 is: 110.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.49 : 240.40 = 73.90 : x
  2. Step 2: Convert to fraction form
    160.49/240.40 = 73.90/x
  3. Step 3: Cross multiply
    160.49x = 240.40 × 73.90
  4. Step 4: Simplify right side
    160.49x = 17,763.99
  5. Step 5: Solve for x
    x = 17,763.99/160.49
  6. Step 6: Final answer
    x = 110.69

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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.