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Finding the Fourth Proportional to 81,348.30, 122,022.45 and 71,506.80

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Solution

The fourth proportional to 81,348.30, 122,022.45 and 71,506.80 is: 107,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.30 : 122,022.45 = 71,506.80 : x
  2. Step 2: Convert to fraction form
    81,348.30/122,022.45 = 71,506.80/x
  3. Step 3: Cross multiply
    81,348.30x = 122,022.45 × 71,506.80
  4. Step 4: Simplify right side
    81,348.30x = 8,725,434,927.66
  5. Step 5: Solve for x
    x = 8,725,434,927.66/81,348.30
  6. Step 6: Final answer
    x = 107,260.20

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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.