Home / 57,130.21-78,839.48-31,979.71

Finding the Fourth Proportional to 57,130.21, 78,839.48 and 31,979.71

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Solution

The fourth proportional to 57,130.21, 78,839.48 and 31,979.71 is: 44,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,130.21 : 78,839.48 = 31,979.71 : x
  2. Step 2: Convert to fraction form
    57,130.21/78,839.48 = 31,979.71/x
  3. Step 3: Cross multiply
    57,130.21x = 78,839.48 × 31,979.71
  4. Step 4: Simplify right side
    57,130.21x = 2,521,263,152.85
  5. Step 5: Solve for x
    x = 2,521,263,152.85/57,130.21
  6. Step 6: Final answer
    x = 44,131.88

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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.