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Finding the Third Proportional to 31,887 and 70,065

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Solution

The third proportional to 31,887 and 70,065 is: 153,953.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,887 : 70,065 = 70,065 : x
  2. Step 2: Convert to fraction form
    31,887/70,065 = 70,065/x
  3. Step 3: Cross multiply
    31,887x = 70,065 × 70,065
  4. Step 4: Simplify right side
    31,887x = 4,909,104,225
  5. Step 5: Solve for x
    x = 4,909,104,225/31,887
  6. Step 6: Final answer
    x = 153,953.15

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.