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Finding the Fourth Proportional to 81,451.40, 122,177.10 and 28,866.20

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Solution

The fourth proportional to 81,451.40, 122,177.10 and 28,866.20 is: 43,299.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,451.40 : 122,177.10 = 28,866.20 : x
  2. Step 2: Convert to fraction form
    81,451.40/122,177.10 = 28,866.20/x
  3. Step 3: Cross multiply
    81,451.40x = 122,177.10 × 28,866.20
  4. Step 4: Simplify right side
    81,451.40x = 3,526,788,604.02
  5. Step 5: Solve for x
    x = 3,526,788,604.02/81,451.40
  6. Step 6: Final answer
    x = 43,299.30

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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.