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Finding the Third Proportional to 48,540 and 77,820

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Solution

The third proportional to 48,540 and 77,820 is: 124,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,540 : 77,820 = 77,820 : x
  2. Step 2: Convert to fraction form
    48,540/77,820 = 77,820/x
  3. Step 3: Cross multiply
    48,540x = 77,820 × 77,820
  4. Step 4: Simplify right side
    48,540x = 6,055,952,400
  5. Step 5: Solve for x
    x = 6,055,952,400/48,540
  6. Step 6: Final answer
    x = 124,762.10

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.