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Finding the Third Proportional to 48,480 and 74,128

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Solution

The third proportional to 48,480 and 74,128 is: 113,344.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,480 : 74,128 = 74,128 : x
  2. Step 2: Convert to fraction form
    48,480/74,128 = 74,128/x
  3. Step 3: Cross multiply
    48,480x = 74,128 × 74,128
  4. Step 4: Simplify right side
    48,480x = 5,494,960,384
  5. Step 5: Solve for x
    x = 5,494,960,384/48,480
  6. Step 6: Final answer
    x = 113,344.89

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.