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Finding the Fourth Proportional to 151.61, 207.85 and 148.87

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Solution

The fourth proportional to 151.61, 207.85 and 148.87 is: 204.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.61 : 207.85 = 148.87 : x
  2. Step 2: Convert to fraction form
    151.61/207.85 = 148.87/x
  3. Step 3: Cross multiply
    151.61x = 207.85 × 148.87
  4. Step 4: Simplify right side
    151.61x = 30,943.52
  5. Step 5: Solve for x
    x = 30,943.52/151.61
  6. Step 6: Final answer
    x = 204.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.