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Finding the Fourth Proportional to 220,069.74, 330,187.65 and 77,909.28

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Solution

The fourth proportional to 220,069.74, 330,187.65 and 77,909.28 is: 116,893.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,069.74 : 330,187.65 = 77,909.28 : x
  2. Step 2: Convert to fraction form
    220,069.74/330,187.65 = 77,909.28/x
  3. Step 3: Cross multiply
    220,069.74x = 330,187.65 × 77,909.28
  4. Step 4: Simplify right side
    220,069.74x = 25,724,682,076.39
  5. Step 5: Solve for x
    x = 25,724,682,076.39/220,069.74
  6. Step 6: Final answer
    x = 116,893.32

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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.