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Finding the Fourth Proportional to 347,105.75, 520,459.37 and 136,628.87

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Solution

The fourth proportional to 347,105.75, 520,459.37 and 136,628.87 is: 204,864.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,105.75 : 520,459.37 = 136,628.87 : x
  2. Step 2: Convert to fraction form
    347,105.75/520,459.37 = 136,628.87/x
  3. Step 3: Cross multiply
    347,105.75x = 520,459.37 × 136,628.87
  4. Step 4: Simplify right side
    347,105.75x = 71,109,774,920.87
  5. Step 5: Solve for x
    x = 71,109,774,920.87/347,105.75
  6. Step 6: Final answer
    x = 204,864.87

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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.