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Finding the Fourth Proportional to 115,809.40, 173,723.70 and 36,921.40

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Solution

The fourth proportional to 115,809.40, 173,723.70 and 36,921.40 is: 55,385.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,809.40 : 173,723.70 = 36,921.40 : x
  2. Step 2: Convert to fraction form
    115,809.40/173,723.70 = 36,921.40/x
  3. Step 3: Cross multiply
    115,809.40x = 173,723.70 × 36,921.40
  4. Step 4: Simplify right side
    115,809.40x = 6,414,122,217.18
  5. Step 5: Solve for x
    x = 6,414,122,217.18/115,809.40
  6. Step 6: Final answer
    x = 55,385.16

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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.