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Finding the Third Proportional to 72 and 151.13

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Solution

The third proportional to 72 and 151.13 is: 317.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72 : 151.13 = 151.13 : x
  2. Step 2: Convert to fraction form
    72/151.13 = 151.13/x
  3. Step 3: Cross multiply
    72x = 151.13 × 151.13
  4. Step 4: Simplify right side
    72x = 22,838.77
  5. Step 5: Solve for x
    x = 22,838.77/72
  6. Step 6: Final answer
    x = 317.21

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.