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Finding the Fourth Proportional to 265,781.86, 398,682.20 and 66,103.29

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Solution

The fourth proportional to 265,781.86, 398,682.20 and 66,103.29 is: 99,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,781.86 : 398,682.20 = 66,103.29 : x
  2. Step 2: Convert to fraction form
    265,781.86/398,682.20 = 66,103.29/x
  3. Step 3: Cross multiply
    265,781.86x = 398,682.20 × 66,103.29
  4. Step 4: Simplify right side
    265,781.86x = 26,354,205,249.70
  5. Step 5: Solve for x
    x = 26,354,205,249.70/265,781.86
  6. Step 6: Final answer
    x = 99,157.28

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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.