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Finding the Fourth Proportional to 119.12, 178.45 and 58.07

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Solution

The fourth proportional to 119.12, 178.45 and 58.07 is: 86.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.12 : 178.45 = 58.07 : x
  2. Step 2: Convert to fraction form
    119.12/178.45 = 58.07/x
  3. Step 3: Cross multiply
    119.12x = 178.45 × 58.07
  4. Step 4: Simplify right side
    119.12x = 10,362.89
  5. Step 5: Solve for x
    x = 10,362.89/119.12
  6. Step 6: Final answer
    x = 86.99

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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.