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Finding the Fourth Proportional to 515,168.56, 772,744.20 and 141,191.56

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Solution

The fourth proportional to 515,168.56, 772,744.20 and 141,191.56 is: 211,784.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,168.56 : 772,744.20 = 141,191.56 : x
  2. Step 2: Convert to fraction form
    515,168.56/772,744.20 = 141,191.56/x
  3. Step 3: Cross multiply
    515,168.56x = 772,744.20 × 141,191.56
  4. Step 4: Simplify right side
    515,168.56x = 109,104,959,078.95
  5. Step 5: Solve for x
    x = 109,104,959,078.95/515,168.56
  6. Step 6: Final answer
    x = 211,784.97

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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.