Home / 56,811.31-78,399.85-31,317.12

Finding the Fourth Proportional to 56,811.31, 78,399.85 and 31,317.12

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Solution

The fourth proportional to 56,811.31, 78,399.85 and 31,317.12 is: 43,217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,811.31 : 78,399.85 = 31,317.12 : x
  2. Step 2: Convert to fraction form
    56,811.31/78,399.85 = 31,317.12/x
  3. Step 3: Cross multiply
    56,811.31x = 78,399.85 × 31,317.12
  4. Step 4: Simplify right side
    56,811.31x = 2,455,257,535.05
  5. Step 5: Solve for x
    x = 2,455,257,535.05/56,811.31
  6. Step 6: Final answer
    x = 43,217.76

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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.