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Finding the Fourth Proportional to 177.44, 265.86 and 90.72

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Solution

The fourth proportional to 177.44, 265.86 and 90.72 is: 135.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.44 : 265.86 = 90.72 : x
  2. Step 2: Convert to fraction form
    177.44/265.86 = 90.72/x
  3. Step 3: Cross multiply
    177.44x = 265.86 × 90.72
  4. Step 4: Simplify right side
    177.44x = 24,118.82
  5. Step 5: Solve for x
    x = 24,118.82/177.44
  6. Step 6: Final answer
    x = 135.93

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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.