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Finding the Fourth Proportional to 119, 178.60 and 64.84

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Solution

The fourth proportional to 119, 178.60 and 64.84 is: 97.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    119 : 178.60 = 64.84 : x
  2. Step 2: Convert to fraction form
    119/178.60 = 64.84/x
  3. Step 3: Cross multiply
    119x = 178.60 × 64.84
  4. Step 4: Simplify right side
    119x = 11,580.42
  5. Step 5: Solve for x
    x = 11,580.42/119
  6. Step 6: Final answer
    x = 97.31

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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.