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Finding the Fourth Proportional to 155,969.39, 215,138.66 and 102,257.88

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Solution

The fourth proportional to 155,969.39, 215,138.66 and 102,257.88 is: 141,050.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,969.39 : 215,138.66 = 102,257.88 : x
  2. Step 2: Convert to fraction form
    155,969.39/215,138.66 = 102,257.88/x
  3. Step 3: Cross multiply
    155,969.39x = 215,138.66 × 102,257.88
  4. Step 4: Simplify right side
    155,969.39x = 21,999,622,766.35
  5. Step 5: Solve for x
    x = 21,999,622,766.35/155,969.39
  6. Step 6: Final answer
    x = 141,050.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.