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Finding the Fourth Proportional to 86,709.69, 130,076.90 and 26,743.20

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Solution

The fourth proportional to 86,709.69, 130,076.90 and 26,743.20 is: 40,118.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,709.69 : 130,076.90 = 26,743.20 : x
  2. Step 2: Convert to fraction form
    86,709.69/130,076.90 = 26,743.20/x
  3. Step 3: Cross multiply
    86,709.69x = 130,076.90 × 26,743.20
  4. Step 4: Simplify right side
    86,709.69x = 3,478,672,418.36
  5. Step 5: Solve for x
    x = 3,478,672,418.36/86,709.69
  6. Step 6: Final answer
    x = 40,118.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.