Home / 81,212.24-121,854.72-51,622.40

Finding the Fourth Proportional to 81,212.24, 121,854.72 and 51,622.40

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Solution

The fourth proportional to 81,212.24, 121,854.72 and 51,622.40 is: 77,456.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.24 : 121,854.72 = 51,622.40 : x
  2. Step 2: Convert to fraction form
    81,212.24/121,854.72 = 51,622.40/x
  3. Step 3: Cross multiply
    81,212.24x = 121,854.72 × 51,622.40
  4. Step 4: Simplify right side
    81,212.24x = 6,290,433,097.73
  5. Step 5: Solve for x
    x = 6,290,433,097.73/81,212.24
  6. Step 6: Final answer
    x = 77,456.71

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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.