Home / 81,646.20-122,446.17-31,715.64

Finding the Fourth Proportional to 81,646.20, 122,446.17 and 31,715.64

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Solution

The fourth proportional to 81,646.20, 122,446.17 and 31,715.64 is: 47,564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,646.20 : 122,446.17 = 31,715.64 : x
  2. Step 2: Convert to fraction form
    81,646.20/122,446.17 = 31,715.64/x
  3. Step 3: Cross multiply
    81,646.20x = 122,446.17 × 31,715.64
  4. Step 4: Simplify right side
    81,646.20x = 3,883,458,647.10
  5. Step 5: Solve for x
    x = 3,883,458,647.10/81,646.20
  6. Step 6: Final answer
    x = 47,564.48

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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.