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Finding the Fourth Proportional to 147.61, 203.47 and 100.97

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Solution

The fourth proportional to 147.61, 203.47 and 100.97 is: 139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.61 : 203.47 = 100.97 : x
  2. Step 2: Convert to fraction form
    147.61/203.47 = 100.97/x
  3. Step 3: Cross multiply
    147.61x = 203.47 × 100.97
  4. Step 4: Simplify right side
    147.61x = 20,544.37
  5. Step 5: Solve for x
    x = 20,544.37/147.61
  6. Step 6: Final answer
    x = 139.18

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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.