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Finding the Fourth Proportional to 177.09, 265.40 and 79.57

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Solution

The fourth proportional to 177.09, 265.40 and 79.57 is: 119.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.09 : 265.40 = 79.57 : x
  2. Step 2: Convert to fraction form
    177.09/265.40 = 79.57/x
  3. Step 3: Cross multiply
    177.09x = 265.40 × 79.57
  4. Step 4: Simplify right side
    177.09x = 21,117.46
  5. Step 5: Solve for x
    x = 21,117.46/177.09
  6. Step 6: Final answer
    x = 119.25

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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.