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Finding the Fourth Proportional to 86,697.16, 129,939.26 and 49,288.60

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Solution

The fourth proportional to 86,697.16, 129,939.26 and 49,288.60 is: 73,872.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,697.16 : 129,939.26 = 49,288.60 : x
  2. Step 2: Convert to fraction form
    86,697.16/129,939.26 = 49,288.60/x
  3. Step 3: Cross multiply
    86,697.16x = 129,939.26 × 49,288.60
  4. Step 4: Simplify right side
    86,697.16x = 6,404,524,210.44
  5. Step 5: Solve for x
    x = 6,404,524,210.44/86,697.16
  6. Step 6: Final answer
    x = 73,872.36

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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.