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Finding the Fourth Proportional to 57,318.33, 79,100.10 and 31,479

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Solution

The fourth proportional to 57,318.33, 79,100.10 and 31,479 is: 43,441.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,318.33 : 79,100.10 = 31,479 : x
  2. Step 2: Convert to fraction form
    57,318.33/79,100.10 = 31,479/x
  3. Step 3: Cross multiply
    57,318.33x = 79,100.10 × 31,479
  4. Step 4: Simplify right side
    57,318.33x = 2,489,992,047.90
  5. Step 5: Solve for x
    x = 2,489,992,047.90/57,318.33
  6. Step 6: Final answer
    x = 43,441.46

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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.