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Finding the Third Proportional to 56,508 and 87,360

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Solution

The third proportional to 56,508 and 87,360 is: 135,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,508 : 87,360 = 87,360 : x
  2. Step 2: Convert to fraction form
    56,508/87,360 = 87,360/x
  3. Step 3: Cross multiply
    56,508x = 87,360 × 87,360
  4. Step 4: Simplify right side
    56,508x = 7,631,769,600
  5. Step 5: Solve for x
    x = 7,631,769,600/56,508
  6. Step 6: Final answer
    x = 135,056.45

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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.