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Finding the Fourth Proportional to 147.05, 203.10 and 100.34

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Solution

The fourth proportional to 147.05, 203.10 and 100.34 is: 138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.05 : 203.10 = 100.34 : x
  2. Step 2: Convert to fraction form
    147.05/203.10 = 100.34/x
  3. Step 3: Cross multiply
    147.05x = 203.10 × 100.34
  4. Step 4: Simplify right side
    147.05x = 20,379.31
  5. Step 5: Solve for x
    x = 20,379.31/147.05
  6. Step 6: Final answer
    x = 138.59

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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.