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Finding the Fourth Proportional to 90,342, 124,671.96 and 55,014

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Solution

The fourth proportional to 90,342, 124,671.96 and 55,014 is: 75,919.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,342 : 124,671.96 = 55,014 : x
  2. Step 2: Convert to fraction form
    90,342/124,671.96 = 55,014/x
  3. Step 3: Cross multiply
    90,342x = 124,671.96 × 55,014
  4. Step 4: Simplify right side
    90,342x = 6,858,703,207.44
  5. Step 5: Solve for x
    x = 6,858,703,207.44/90,342
  6. Step 6: Final answer
    x = 75,919.32

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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.