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Finding the Fourth Proportional to 86,076.66, 129,115.10 and 26,912.64

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Solution

The fourth proportional to 86,076.66, 129,115.10 and 26,912.64 is: 40,368.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,076.66 : 129,115.10 = 26,912.64 : x
  2. Step 2: Convert to fraction form
    86,076.66/129,115.10 = 26,912.64/x
  3. Step 3: Cross multiply
    86,076.66x = 129,115.10 × 26,912.64
  4. Step 4: Simplify right side
    86,076.66x = 3,474,828,204.86
  5. Step 5: Solve for x
    x = 3,474,828,204.86/86,076.66
  6. Step 6: Final answer
    x = 40,368.99

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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.