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Finding the Fourth Proportional to 90,408, 124,764.48 and 50,664

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Solution

The fourth proportional to 90,408, 124,764.48 and 50,664 is: 69,917.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,408 : 124,764.48 = 50,664 : x
  2. Step 2: Convert to fraction form
    90,408/124,764.48 = 50,664/x
  3. Step 3: Cross multiply
    90,408x = 124,764.48 × 50,664
  4. Step 4: Simplify right side
    90,408x = 6,321,067,614.72
  5. Step 5: Solve for x
    x = 6,321,067,614.72/90,408
  6. Step 6: Final answer
    x = 69,917.13

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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.