Home / 81,970.38-122,873.48-31,981.70

Finding the Fourth Proportional to 81,970.38, 122,873.48 and 31,981.70

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Solution

The fourth proportional to 81,970.38, 122,873.48 and 31,981.70 is: 47,940.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,970.38 : 122,873.48 = 31,981.70 : x
  2. Step 2: Convert to fraction form
    81,970.38/122,873.48 = 31,981.70/x
  3. Step 3: Cross multiply
    81,970.38x = 122,873.48 × 31,981.70
  4. Step 4: Simplify right side
    81,970.38x = 3,929,702,775.32
  5. Step 5: Solve for x
    x = 3,929,702,775.32/81,970.38
  6. Step 6: Final answer
    x = 47,940.52

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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.