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Finding the Fourth Proportional to 220,138.22, 330,020.78 and 87,112.32

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Solution

The fourth proportional to 220,138.22, 330,020.78 and 87,112.32 is: 130,594.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,138.22 : 330,020.78 = 87,112.32 : x
  2. Step 2: Convert to fraction form
    220,138.22/330,020.78 = 87,112.32/x
  3. Step 3: Cross multiply
    220,138.22x = 330,020.78 × 87,112.32
  4. Step 4: Simplify right side
    220,138.22x = 28,748,875,794.01
  5. Step 5: Solve for x
    x = 28,748,875,794.01/220,138.22
  6. Step 6: Final answer
    x = 130,594.66

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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.