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Finding the Fourth Proportional to 158,910.20, 219,315.60 and 91,842.20

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Solution

The fourth proportional to 158,910.20, 219,315.60 and 91,842.20 is: 126,753.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,910.20 : 219,315.60 = 91,842.20 : x
  2. Step 2: Convert to fraction form
    158,910.20/219,315.60 = 91,842.20/x
  3. Step 3: Cross multiply
    158,910.20x = 219,315.60 × 91,842.20
  4. Step 4: Simplify right side
    158,910.20x = 20,142,427,198.32
  5. Step 5: Solve for x
    x = 20,142,427,198.32/158,910.20
  6. Step 6: Final answer
    x = 126,753.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.