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Finding the Fourth Proportional to 119.04, 178.64 and 61.28

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Solution

The fourth proportional to 119.04, 178.64 and 61.28 is: 91.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.04 : 178.64 = 61.28 : x
  2. Step 2: Convert to fraction form
    119.04/178.64 = 61.28/x
  3. Step 3: Cross multiply
    119.04x = 178.64 × 61.28
  4. Step 4: Simplify right side
    119.04x = 10,947.52
  5. Step 5: Solve for x
    x = 10,947.52/119.04
  6. Step 6: Final answer
    x = 91.96

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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.