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Finding the Fourth Proportional to 54,079.52, 74,629.28 and 31,431.76

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Solution

The fourth proportional to 54,079.52, 74,629.28 and 31,431.76 is: 43,375.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,079.52 : 74,629.28 = 31,431.76 : x
  2. Step 2: Convert to fraction form
    54,079.52/74,629.28 = 31,431.76/x
  3. Step 3: Cross multiply
    54,079.52x = 74,629.28 × 31,431.76
  4. Step 4: Simplify right side
    54,079.52x = 2,345,729,509.94
  5. Step 5: Solve for x
    x = 2,345,729,509.94/54,079.52
  6. Step 6: Final answer
    x = 43,375.56

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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.