Home / 81,898.64-122,821.84-31,966.60

Finding the Fourth Proportional to 81,898.64, 122,821.84 and 31,966.60

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Solution

The fourth proportional to 81,898.64, 122,821.84 and 31,966.60 is: 47,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,898.64 : 122,821.84 = 31,966.60 : x
  2. Step 2: Convert to fraction form
    81,898.64/122,821.84 = 31,966.60/x
  3. Step 3: Cross multiply
    81,898.64x = 122,821.84 × 31,966.60
  4. Step 4: Simplify right side
    81,898.64x = 3,926,196,630.54
  5. Step 5: Solve for x
    x = 3,926,196,630.54/81,898.64
  6. Step 6: Final answer
    x = 47,939.70

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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.