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Finding the Third Proportional to 71,555.91 and 121,868.30

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Solution

The third proportional to 71,555.91 and 121,868.30 is: 207,556.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,555.91 : 121,868.30 = 121,868.30 : x
  2. Step 2: Convert to fraction form
    71,555.91/121,868.30 = 121,868.30/x
  3. Step 3: Cross multiply
    71,555.91x = 121,868.30 × 121,868.30
  4. Step 4: Simplify right side
    71,555.91x = 14,851,881,783.21
  5. Step 5: Solve for x
    x = 14,851,881,783.21/71,555.91
  6. Step 6: Final answer
    x = 207,556.34

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.