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Finding the Fourth Proportional to 57,489.64, 79,339.51 and 31,995.72

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Solution

The fourth proportional to 57,489.64, 79,339.51 and 31,995.72 is: 44,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,489.64 : 79,339.51 = 31,995.72 : x
  2. Step 2: Convert to fraction form
    57,489.64/79,339.51 = 31,995.72/x
  3. Step 3: Cross multiply
    57,489.64x = 79,339.51 × 31,995.72
  4. Step 4: Simplify right side
    57,489.64x = 2,538,524,786.89
  5. Step 5: Solve for x
    x = 2,538,524,786.89/57,489.64
  6. Step 6: Final answer
    x = 44,156.21

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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.