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Finding the Fourth Proportional to 220,616.16, 330,814.92 and 78,440.13

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Solution

The fourth proportional to 220,616.16, 330,814.92 and 78,440.13 is: 117,621.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,616.16 : 330,814.92 = 78,440.13 : x
  2. Step 2: Convert to fraction form
    220,616.16/330,814.92 = 78,440.13/x
  3. Step 3: Cross multiply
    220,616.16x = 330,814.92 × 78,440.13
  4. Step 4: Simplify right side
    220,616.16x = 25,949,165,330.74
  5. Step 5: Solve for x
    x = 25,949,165,330.74/220,616.16
  6. Step 6: Final answer
    x = 117,621.33

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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.