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Finding the Fourth Proportional to 220,115.64, 330,321.42 and 77,960.40

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Solution

The fourth proportional to 220,115.64, 330,321.42 and 77,960.40 is: 116,993.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,115.64 : 330,321.42 = 77,960.40 : x
  2. Step 2: Convert to fraction form
    220,115.64/330,321.42 = 77,960.40/x
  3. Step 3: Cross multiply
    220,115.64x = 330,321.42 × 77,960.40
  4. Step 4: Simplify right side
    220,115.64x = 25,751,990,031.77
  5. Step 5: Solve for x
    x = 25,751,990,031.77/220,115.64
  6. Step 6: Final answer
    x = 116,993.00

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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.