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Finding the Fourth Proportional to 220,603.88, 330,863.42 and 85,667.88

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Solution

The fourth proportional to 220,603.88, 330,863.42 and 85,667.88 is: 128,485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,603.88 : 330,863.42 = 85,667.88 : x
  2. Step 2: Convert to fraction form
    220,603.88/330,863.42 = 85,667.88/x
  3. Step 3: Cross multiply
    220,603.88x = 330,863.42 × 85,667.88
  4. Step 4: Simplify right side
    220,603.88x = 28,344,367,760.95
  5. Step 5: Solve for x
    x = 28,344,367,760.95/220,603.88
  6. Step 6: Final answer
    x = 128,485.35

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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.