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Finding the Third Proportional to 55,520 and 84,432

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Solution

The third proportional to 55,520 and 84,432 is: 128,399.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,520 : 84,432 = 84,432 : x
  2. Step 2: Convert to fraction form
    55,520/84,432 = 84,432/x
  3. Step 3: Cross multiply
    55,520x = 84,432 × 84,432
  4. Step 4: Simplify right side
    55,520x = 7,128,762,624
  5. Step 5: Solve for x
    x = 7,128,762,624/55,520
  6. Step 6: Final answer
    x = 128,399.90

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.