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Finding the Third Proportional to 30,390 and 48,081

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Solution

The third proportional to 30,390 and 48,081 is: 76,070.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390 : 48,081 = 48,081 : x
  2. Step 2: Convert to fraction form
    30,390/48,081 = 48,081/x
  3. Step 3: Cross multiply
    30,390x = 48,081 × 48,081
  4. Step 4: Simplify right side
    30,390x = 2,311,782,561
  5. Step 5: Solve for x
    x = 2,311,782,561/30,390
  6. Step 6: Final answer
    x = 76,070.50

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.