Home / 81,421.64-122,163.22-31,504.74

Finding the Fourth Proportional to 81,421.64, 122,163.22 and 31,504.74

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Solution

The fourth proportional to 81,421.64, 122,163.22 and 31,504.74 is: 47,269.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.64 : 122,163.22 = 31,504.74 : x
  2. Step 2: Convert to fraction form
    81,421.64/122,163.22 = 31,504.74/x
  3. Step 3: Cross multiply
    81,421.64x = 122,163.22 × 31,504.74
  4. Step 4: Simplify right side
    81,421.64x = 3,848,720,483.66
  5. Step 5: Solve for x
    x = 3,848,720,483.66/81,421.64
  6. Step 6: Final answer
    x = 47,269.01

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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.