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Finding the Third Proportional to 47,040 and 77,220

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Solution

The third proportional to 47,040 and 77,220 is: 126,762.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,040 : 77,220 = 77,220 : x
  2. Step 2: Convert to fraction form
    47,040/77,220 = 77,220/x
  3. Step 3: Cross multiply
    47,040x = 77,220 × 77,220
  4. Step 4: Simplify right side
    47,040x = 5,962,928,400
  5. Step 5: Solve for x
    x = 5,962,928,400/47,040
  6. Step 6: Final answer
    x = 126,762.93

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.