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Finding the Fourth Proportional to 147.47, 203.91 and 145.15

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Solution

The fourth proportional to 147.47, 203.91 and 145.15 is: 200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.47 : 203.91 = 145.15 : x
  2. Step 2: Convert to fraction form
    147.47/203.91 = 145.15/x
  3. Step 3: Cross multiply
    147.47x = 203.91 × 145.15
  4. Step 4: Simplify right side
    147.47x = 29,597.54
  5. Step 5: Solve for x
    x = 29,597.54/147.47
  6. Step 6: Final answer
    x = 200.70

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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.