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Finding the Fourth Proportional to 90,435, 124,800.48 and 50,691

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Solution

The fourth proportional to 90,435, 124,800.48 and 50,691 is: 69,953.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,435 : 124,800.48 = 50,691 : x
  2. Step 2: Convert to fraction form
    90,435/124,800.48 = 50,691/x
  3. Step 3: Cross multiply
    90,435x = 124,800.48 × 50,691
  4. Step 4: Simplify right side
    90,435x = 6,326,261,131.68
  5. Step 5: Solve for x
    x = 6,326,261,131.68/90,435
  6. Step 6: Final answer
    x = 69,953.68

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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.