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Finding the Fourth Proportional to 86,980.62, 130,478.90 and 27,009.44

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Solution

The fourth proportional to 86,980.62, 130,478.90 and 27,009.44 is: 40,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,980.62 : 130,478.90 = 27,009.44 : x
  2. Step 2: Convert to fraction form
    86,980.62/130,478.90 = 27,009.44/x
  3. Step 3: Cross multiply
    86,980.62x = 130,478.90 × 27,009.44
  4. Step 4: Simplify right side
    86,980.62x = 3,524,162,020.82
  5. Step 5: Solve for x
    x = 3,524,162,020.82/86,980.62
  6. Step 6: Final answer
    x = 40,516.63

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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.