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Finding the Fourth Proportional to 142.95, 213.62 and 106.47

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Solution

The fourth proportional to 142.95, 213.62 and 106.47 is: 159.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.95 : 213.62 = 106.47 : x
  2. Step 2: Convert to fraction form
    142.95/213.62 = 106.47/x
  3. Step 3: Cross multiply
    142.95x = 213.62 × 106.47
  4. Step 4: Simplify right side
    142.95x = 22,744.12
  5. Step 5: Solve for x
    x = 22,744.12/142.95
  6. Step 6: Final answer
    x = 159.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.