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Finding the Third Proportional to 55,640 and 86,160

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Solution

The third proportional to 55,640 and 86,160 is: 133,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,640 : 86,160 = 86,160 : x
  2. Step 2: Convert to fraction form
    55,640/86,160 = 86,160/x
  3. Step 3: Cross multiply
    55,640x = 86,160 × 86,160
  4. Step 4: Simplify right side
    55,640x = 7,423,545,600
  5. Step 5: Solve for x
    x = 7,423,545,600/55,640
  6. Step 6: Final answer
    x = 133,421.02

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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.