Home / 81,890.76-122,830.32-31,961.52

Finding the Fourth Proportional to 81,890.76, 122,830.32 and 31,961.52

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Solution

The fourth proportional to 81,890.76, 122,830.32 and 31,961.52 is: 47,940.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,890.76 : 122,830.32 = 31,961.52 : x
  2. Step 2: Convert to fraction form
    81,890.76/122,830.32 = 31,961.52/x
  3. Step 3: Cross multiply
    81,890.76x = 122,830.32 × 31,961.52
  4. Step 4: Simplify right side
    81,890.76x = 3,925,843,729.29
  5. Step 5: Solve for x
    x = 3,925,843,729.29/81,890.76
  6. Step 6: Final answer
    x = 47,940.01

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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.