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Finding the Fourth Proportional to 57,756.51, 79,659.86 and 39,881.43

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Solution

The fourth proportional to 57,756.51, 79,659.86 and 39,881.43 is: 55,005.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,756.51 : 79,659.86 = 39,881.43 : x
  2. Step 2: Convert to fraction form
    57,756.51/79,659.86 = 39,881.43/x
  3. Step 3: Cross multiply
    57,756.51x = 79,659.86 × 39,881.43
  4. Step 4: Simplify right side
    57,756.51x = 3,176,948,930.99
  5. Step 5: Solve for x
    x = 3,176,948,930.99/57,756.51
  6. Step 6: Final answer
    x = 55,005.90

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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.