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Finding the Fourth Proportional to 86,896.31, 130,346.89 and 30,728.48

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Solution

The fourth proportional to 86,896.31, 130,346.89 and 30,728.48 is: 46,093.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,896.31 : 130,346.89 = 30,728.48 : x
  2. Step 2: Convert to fraction form
    86,896.31/130,346.89 = 30,728.48/x
  3. Step 3: Cross multiply
    86,896.31x = 130,346.89 × 30,728.48
  4. Step 4: Simplify right side
    86,896.31x = 4,005,361,073.87
  5. Step 5: Solve for x
    x = 4,005,361,073.87/86,896.31
  6. Step 6: Final answer
    x = 46,093.57

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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.