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Finding the Fourth Proportional to 110,712.80, 166,069.20 and 40,619.45

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Solution

The fourth proportional to 110,712.80, 166,069.20 and 40,619.45 is: 60,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,712.80 : 166,069.20 = 40,619.45 : x
  2. Step 2: Convert to fraction form
    110,712.80/166,069.20 = 40,619.45/x
  3. Step 3: Cross multiply
    110,712.80x = 166,069.20 × 40,619.45
  4. Step 4: Simplify right side
    110,712.80x = 6,745,639,565.94
  5. Step 5: Solve for x
    x = 6,745,639,565.94/110,712.80
  6. Step 6: Final answer
    x = 60,929.18

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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.