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Finding the Third Proportional to 55,712 and 86,342

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Solution

The third proportional to 55,712 and 86,342 is: 133,812.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,712 : 86,342 = 86,342 : x
  2. Step 2: Convert to fraction form
    55,712/86,342 = 86,342/x
  3. Step 3: Cross multiply
    55,712x = 86,342 × 86,342
  4. Step 4: Simplify right side
    55,712x = 7,454,940,964
  5. Step 5: Solve for x
    x = 7,454,940,964/55,712
  6. Step 6: Final answer
    x = 133,812.12

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.