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Finding the Fourth Proportional to 115,422.59, 159,349.43 and 87,983.27

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Solution

The fourth proportional to 115,422.59, 159,349.43 and 87,983.27 is: 121,467.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,422.59 : 159,349.43 = 87,983.27 : x
  2. Step 2: Convert to fraction form
    115,422.59/159,349.43 = 87,983.27/x
  3. Step 3: Cross multiply
    115,422.59x = 159,349.43 × 87,983.27
  4. Step 4: Simplify right side
    115,422.59x = 14,020,083,347.25
  5. Step 5: Solve for x
    x = 14,020,083,347.25/115,422.59
  6. Step 6: Final answer
    x = 121,467.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.