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Finding the Fourth Proportional to 90,478.79, 124,860.59 and 50,198.69

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Solution

The fourth proportional to 90,478.79, 124,860.59 and 50,198.69 is: 69,274.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,478.79 : 124,860.59 = 50,198.69 : x
  2. Step 2: Convert to fraction form
    90,478.79/124,860.59 = 50,198.69/x
  3. Step 3: Cross multiply
    90,478.79x = 124,860.59 × 50,198.69
  4. Step 4: Simplify right side
    90,478.79x = 6,267,837,799.63
  5. Step 5: Solve for x
    x = 6,267,837,799.63/90,478.79
  6. Step 6: Final answer
    x = 69,274.11

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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.