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Finding the Third Proportional to 87,309 and 129,325.50

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Solution

The third proportional to 87,309 and 129,325.50 is: 191,561.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,309 : 129,325.50 = 129,325.50 : x
  2. Step 2: Convert to fraction form
    87,309/129,325.50 = 129,325.50/x
  3. Step 3: Cross multiply
    87,309x = 129,325.50 × 129,325.50
  4. Step 4: Simplify right side
    87,309x = 16,725,084,950.25
  5. Step 5: Solve for x
    x = 16,725,084,950.25/87,309
  6. Step 6: Final answer
    x = 191,561.98

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.