Home / 81,718.27-122,583.58-31,776.91

Finding the Fourth Proportional to 81,718.27, 122,583.58 and 31,776.91

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Solution

The fourth proportional to 81,718.27, 122,583.58 and 31,776.91 is: 47,667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,718.27 : 122,583.58 = 31,776.91 : x
  2. Step 2: Convert to fraction form
    81,718.27/122,583.58 = 31,776.91/x
  3. Step 3: Cross multiply
    81,718.27x = 122,583.58 × 31,776.91
  4. Step 4: Simplify right side
    81,718.27x = 3,895,327,003.24
  5. Step 5: Solve for x
    x = 3,895,327,003.24/81,718.27
  6. Step 6: Final answer
    x = 47,667.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.