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Finding the Fourth Proportional to 90,702.92, 125,169.22 and 50,415.64

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Solution

The fourth proportional to 90,702.92, 125,169.22 and 50,415.64 is: 69,573.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.92 : 125,169.22 = 50,415.64 : x
  2. Step 2: Convert to fraction form
    90,702.92/125,169.22 = 50,415.64/x
  3. Step 3: Cross multiply
    90,702.92x = 125,169.22 × 50,415.64
  4. Step 4: Simplify right side
    90,702.92x = 6,310,486,334.60
  5. Step 5: Solve for x
    x = 6,310,486,334.60/90,702.92
  6. Step 6: Final answer
    x = 69,573.13

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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.