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Finding the Third Proportional to 72,840 and 98,880

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Solution

The third proportional to 72,840 and 98,880 is: 134,229.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,840 : 98,880 = 98,880 : x
  2. Step 2: Convert to fraction form
    72,840/98,880 = 98,880/x
  3. Step 3: Cross multiply
    72,840x = 98,880 × 98,880
  4. Step 4: Simplify right side
    72,840x = 9,777,254,400
  5. Step 5: Solve for x
    x = 9,777,254,400/72,840
  6. Step 6: Final answer
    x = 134,229.19

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.