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Finding the Fourth Proportional to 265,542.21, 398,155.28 and 105,531.57

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Solution

The fourth proportional to 265,542.21, 398,155.28 and 105,531.57 is: 158,234.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,542.21 : 398,155.28 = 105,531.57 : x
  2. Step 2: Convert to fraction form
    265,542.21/398,155.28 = 105,531.57/x
  3. Step 3: Cross multiply
    265,542.21x = 398,155.28 × 105,531.57
  4. Step 4: Simplify right side
    265,542.21x = 42,017,951,274.53
  5. Step 5: Solve for x
    x = 42,017,951,274.53/265,542.21
  6. Step 6: Final answer
    x = 158,234.55

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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.