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Finding the Third Proportional to 64,378.50 and 99,486

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Solution

The third proportional to 64,378.50 and 99,486 is: 153,738.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,378.50 : 99,486 = 99,486 : x
  2. Step 2: Convert to fraction form
    64,378.50/99,486 = 99,486/x
  3. Step 3: Cross multiply
    64,378.50x = 99,486 × 99,486
  4. Step 4: Simplify right side
    64,378.50x = 9,897,464,196
  5. Step 5: Solve for x
    x = 9,897,464,196/64,378.50
  6. Step 6: Final answer
    x = 153,738.66

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.