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Finding the Fourth Proportional to 177.56, 265.98 and 85.98

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Solution

The fourth proportional to 177.56, 265.98 and 85.98 is: 128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.56 : 265.98 = 85.98 : x
  2. Step 2: Convert to fraction form
    177.56/265.98 = 85.98/x
  3. Step 3: Cross multiply
    177.56x = 265.98 × 85.98
  4. Step 4: Simplify right side
    177.56x = 22,868.78
  5. Step 5: Solve for x
    x = 22,868.78/177.56
  6. Step 6: Final answer
    x = 128.80

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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.