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Finding the Third Proportional to 90,078 and 129,750

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Solution

The third proportional to 90,078 and 129,750 is: 186,894.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,078 : 129,750 = 129,750 : x
  2. Step 2: Convert to fraction form
    90,078/129,750 = 129,750/x
  3. Step 3: Cross multiply
    90,078x = 129,750 × 129,750
  4. Step 4: Simplify right side
    90,078x = 16,835,062,500
  5. Step 5: Solve for x
    x = 16,835,062,500/90,078
  6. Step 6: Final answer
    x = 186,894.27

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.