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Finding the Fourth Proportional to 57,722.84, 79,658.76 and 31,881.30

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Solution

The fourth proportional to 57,722.84, 79,658.76 and 31,881.30 is: 43,996.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,722.84 : 79,658.76 = 31,881.30 : x
  2. Step 2: Convert to fraction form
    57,722.84/79,658.76 = 31,881.30/x
  3. Step 3: Cross multiply
    57,722.84x = 79,658.76 × 31,881.30
  4. Step 4: Simplify right side
    57,722.84x = 2,539,624,825.19
  5. Step 5: Solve for x
    x = 2,539,624,825.19/57,722.84
  6. Step 6: Final answer
    x = 43,996.88

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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.