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Finding the Fourth Proportional to 160.55, 240.76 and 57.81

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Solution

The fourth proportional to 160.55, 240.76 and 57.81 is: 86.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.55 : 240.76 = 57.81 : x
  2. Step 2: Convert to fraction form
    160.55/240.76 = 57.81/x
  3. Step 3: Cross multiply
    160.55x = 240.76 × 57.81
  4. Step 4: Simplify right side
    160.55x = 13,918.34
  5. Step 5: Solve for x
    x = 13,918.34/160.55
  6. Step 6: Final answer
    x = 86.69

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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.