Home / 81,511.72-122,257.11-31,557.58

Finding the Fourth Proportional to 81,511.72, 122,257.11 and 31,557.58

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Solution

The fourth proportional to 81,511.72, 122,257.11 and 31,557.58 is: 47,332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,511.72 : 122,257.11 = 31,557.58 : x
  2. Step 2: Convert to fraction form
    81,511.72/122,257.11 = 31,557.58/x
  3. Step 3: Cross multiply
    81,511.72x = 122,257.11 × 31,557.58
  4. Step 4: Simplify right side
    81,511.72x = 3,858,138,529.39
  5. Step 5: Solve for x
    x = 3,858,138,529.39/81,511.72
  6. Step 6: Final answer
    x = 47,332.32

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1.5x scale

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.