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Finding the Third Proportional to 71,421.75 and 136,363.50

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Solution

The third proportional to 71,421.75 and 136,363.50 is: 260,354.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,421.75 : 136,363.50 = 136,363.50 : x
  2. Step 2: Convert to fraction form
    71,421.75/136,363.50 = 136,363.50/x
  3. Step 3: Cross multiply
    71,421.75x = 136,363.50 × 136,363.50
  4. Step 4: Simplify right side
    71,421.75x = 18,595,004,132.25
  5. Step 5: Solve for x
    x = 18,595,004,132.25/71,421.75
  6. Step 6: Final answer
    x = 260,354.92

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.