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Finding the Fourth Proportional to 86,676.90, 121,610.10 and 86,676.90

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Solution

The fourth proportional to 86,676.90, 121,610.10 and 86,676.90 is: 121,610.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,676.90 : 121,610.10 = 86,676.90 : x
  2. Step 2: Convert to fraction form
    86,676.90/121,610.10 = 86,676.90/x
  3. Step 3: Cross multiply
    86,676.90x = 121,610.10 × 86,676.90
  4. Step 4: Simplify right side
    86,676.90x = 10,540,786,476.69
  5. Step 5: Solve for x
    x = 10,540,786,476.69/86,676.90
  6. Step 6: Final answer
    x = 121,610.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.