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Finding the Fourth Proportional to 57,412.91, 79,230.89 and 31,921.40

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Solution

The fourth proportional to 57,412.91, 79,230.89 and 31,921.40 is: 44,052.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,412.91 : 79,230.89 = 31,921.40 : x
  2. Step 2: Convert to fraction form
    57,412.91/79,230.89 = 31,921.40/x
  3. Step 3: Cross multiply
    57,412.91x = 79,230.89 × 31,921.40
  4. Step 4: Simplify right side
    57,412.91x = 2,529,160,932.05
  5. Step 5: Solve for x
    x = 2,529,160,932.05/57,412.91
  6. Step 6: Final answer
    x = 44,052.13

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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.