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Finding the Fourth Proportional to 55,910.79, 83,880.77 and 20,850.75

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Solution

The fourth proportional to 55,910.79, 83,880.77 and 20,850.75 is: 31,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,910.79 : 83,880.77 = 20,850.75 : x
  2. Step 2: Convert to fraction form
    55,910.79/83,880.77 = 20,850.75/x
  3. Step 3: Cross multiply
    55,910.79x = 83,880.77 × 20,850.75
  4. Step 4: Simplify right side
    55,910.79x = 1,748,976,860.82
  5. Step 5: Solve for x
    x = 1,748,976,860.82/55,910.79
  6. Step 6: Final answer
    x = 31,281.56

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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.