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Finding the Fourth Proportional to 115,425.35, 159,353.25 and 87,986.03

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Solution

The fourth proportional to 115,425.35, 159,353.25 and 87,986.03 is: 121,471.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,425.35 : 159,353.25 = 87,986.03 : x
  2. Step 2: Convert to fraction form
    115,425.35/159,353.25 = 87,986.03/x
  3. Step 3: Cross multiply
    115,425.35x = 159,353.25 × 87,986.03
  4. Step 4: Simplify right side
    115,425.35x = 14,020,859,038.33
  5. Step 5: Solve for x
    x = 14,020,859,038.33/115,425.35
  6. Step 6: Final answer
    x = 121,471.23

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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.