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Finding the Fourth Proportional to 147, 203.15 and 112.01

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Solution

The fourth proportional to 147, 203.15 and 112.01 is: 154.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    147 : 203.15 = 112.01 : x
  2. Step 2: Convert to fraction form
    147/203.15 = 112.01/x
  3. Step 3: Cross multiply
    147x = 203.15 × 112.01
  4. Step 4: Simplify right side
    147x = 22,754.83
  5. Step 5: Solve for x
    x = 22,754.83/147
  6. Step 6: Final answer
    x = 154.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.