Home / 56,718.50-78,268.07-31,219.90

Finding the Fourth Proportional to 56,718.50, 78,268.07 and 31,219.90

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Solution

The fourth proportional to 56,718.50, 78,268.07 and 31,219.90 is: 43,081.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,718.50 : 78,268.07 = 31,219.90 : x
  2. Step 2: Convert to fraction form
    56,718.50/78,268.07 = 31,219.90/x
  3. Step 3: Cross multiply
    56,718.50x = 78,268.07 × 31,219.90
  4. Step 4: Simplify right side
    56,718.50x = 2,443,521,200.97
  5. Step 5: Solve for x
    x = 2,443,521,200.97/56,718.50
  6. Step 6: Final answer
    x = 43,081.56

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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.