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Finding the Fourth Proportional to 57,473.47, 79,311.81 and 31,978.54

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Solution

The fourth proportional to 57,473.47, 79,311.81 and 31,978.54 is: 44,129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,473.47 : 79,311.81 = 31,978.54 : x
  2. Step 2: Convert to fraction form
    57,473.47/79,311.81 = 31,978.54/x
  3. Step 3: Cross multiply
    57,473.47x = 79,311.81 × 31,978.54
  4. Step 4: Simplify right side
    57,473.47x = 2,536,275,888.56
  5. Step 5: Solve for x
    x = 2,536,275,888.56/57,473.47
  6. Step 6: Final answer
    x = 44,129.51

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1.5x scale

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.