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Finding the Fourth Proportional to 90,891, 136,296.54 and 48,758.58

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Solution

The fourth proportional to 90,891, 136,296.54 and 48,758.58 is: 73,116.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,891 : 136,296.54 = 48,758.58 : x
  2. Step 2: Convert to fraction form
    90,891/136,296.54 = 48,758.58/x
  3. Step 3: Cross multiply
    90,891x = 136,296.54 × 48,758.58
  4. Step 4: Simplify right side
    90,891x = 6,645,625,749.31
  5. Step 5: Solve for x
    x = 6,645,625,749.31/90,891
  6. Step 6: Final answer
    x = 73,116.43

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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.