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Finding the Fourth Proportional to 117.96, 177.02 and 61

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Solution

The fourth proportional to 117.96, 177.02 and 61 is: 91.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.96 : 177.02 = 61 : x
  2. Step 2: Convert to fraction form
    117.96/177.02 = 61/x
  3. Step 3: Cross multiply
    117.96x = 177.02 × 61
  4. Step 4: Simplify right side
    117.96x = 10,798.22
  5. Step 5: Solve for x
    x = 10,798.22/117.96
  6. Step 6: Final answer
    x = 91.54

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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.