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Finding the Fourth Proportional to 86,790.89, 130,200.92 and 27,644.69

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Solution

The fourth proportional to 86,790.89, 130,200.92 and 27,644.69 is: 41,471.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,790.89 : 130,200.92 = 27,644.69 : x
  2. Step 2: Convert to fraction form
    86,790.89/130,200.92 = 27,644.69/x
  3. Step 3: Cross multiply
    86,790.89x = 130,200.92 × 27,644.69
  4. Step 4: Simplify right side
    86,790.89x = 3,599,364,362.06
  5. Step 5: Solve for x
    x = 3,599,364,362.06/86,790.89
  6. Step 6: Final answer
    x = 41,471.68

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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.