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Finding the Fourth Proportional to 265,892.20, 398,721.54 and 99,563.56

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Solution

The fourth proportional to 265,892.20, 398,721.54 and 99,563.56 is: 149,301.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,892.20 : 398,721.54 = 99,563.56 : x
  2. Step 2: Convert to fraction form
    265,892.20/398,721.54 = 99,563.56/x
  3. Step 3: Cross multiply
    265,892.20x = 398,721.54 × 99,563.56
  4. Step 4: Simplify right side
    265,892.20x = 39,698,135,971.08
  5. Step 5: Solve for x
    x = 39,698,135,971.08/265,892.20
  6. Step 6: Final answer
    x = 149,301.62

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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.