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Finding the Fourth Proportional to 81,104.80, 121,599.60 and 31,165.60

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Solution

The fourth proportional to 81,104.80, 121,599.60 and 31,165.60 is: 46,726.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.80 : 121,599.60 = 31,165.60 : x
  2. Step 2: Convert to fraction form
    81,104.80/121,599.60 = 31,165.60/x
  3. Step 3: Cross multiply
    81,104.80x = 121,599.60 × 31,165.60
  4. Step 4: Simplify right side
    81,104.80x = 3,789,724,493.76
  5. Step 5: Solve for x
    x = 3,789,724,493.76/81,104.80
  6. Step 6: Final answer
    x = 46,726.27

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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.