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Finding the Third Proportional to 19,747.50 and 42,207

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Solution

The third proportional to 19,747.50 and 42,207 is: 90,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,747.50 : 42,207 = 42,207 : x
  2. Step 2: Convert to fraction form
    19,747.50/42,207 = 42,207/x
  3. Step 3: Cross multiply
    19,747.50x = 42,207 × 42,207
  4. Step 4: Simplify right side
    19,747.50x = 1,781,430,849
  5. Step 5: Solve for x
    x = 1,781,430,849/19,747.50
  6. Step 6: Final answer
    x = 90,210.45

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.