Home / 57,073.50-78,759.91-31,579.20

Finding the Fourth Proportional to 57,073.50, 78,759.91 and 31,579.20

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Solution

The fourth proportional to 57,073.50, 78,759.91 and 31,579.20 is: 43,578.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,073.50 : 78,759.91 = 31,579.20 : x
  2. Step 2: Convert to fraction form
    57,073.50/78,759.91 = 31,579.20/x
  3. Step 3: Cross multiply
    57,073.50x = 78,759.91 × 31,579.20
  4. Step 4: Simplify right side
    57,073.50x = 2,487,174,398.18
  5. Step 5: Solve for x
    x = 2,487,174,398.18/57,073.50
  6. Step 6: Final answer
    x = 43,578.45

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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.