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Finding the Fourth Proportional to 142.04, 212.70 and 119.16

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Solution

The fourth proportional to 142.04, 212.70 and 119.16 is: 178.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.04 : 212.70 = 119.16 : x
  2. Step 2: Convert to fraction form
    142.04/212.70 = 119.16/x
  3. Step 3: Cross multiply
    142.04x = 212.70 × 119.16
  4. Step 4: Simplify right side
    142.04x = 25,345.33
  5. Step 5: Solve for x
    x = 25,345.33/142.04
  6. Step 6: Final answer
    x = 178.44

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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.