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Finding the Third Proportional to 100,123.50 and 217,557

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Solution

The third proportional to 100,123.50 and 217,557 is: 472,726.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,123.50 : 217,557 = 217,557 : x
  2. Step 2: Convert to fraction form
    100,123.50/217,557 = 217,557/x
  3. Step 3: Cross multiply
    100,123.50x = 217,557 × 217,557
  4. Step 4: Simplify right side
    100,123.50x = 47,331,048,249
  5. Step 5: Solve for x
    x = 47,331,048,249/100,123.50
  6. Step 6: Final answer
    x = 472,726.67

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.