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Finding the Fourth Proportional to 115,958.61, 173,738.22 and 90,648.28

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Solution

The fourth proportional to 115,958.61, 173,738.22 and 90,648.28 is: 135,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,958.61 : 173,738.22 = 90,648.28 : x
  2. Step 2: Convert to fraction form
    115,958.61/173,738.22 = 90,648.28/x
  3. Step 3: Cross multiply
    115,958.61x = 173,738.22 × 90,648.28
  4. Step 4: Simplify right side
    115,958.61x = 15,749,069,957.55
  5. Step 5: Solve for x
    x = 15,749,069,957.55/115,958.61
  6. Step 6: Final answer
    x = 135,816.30

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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.