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Finding the Fourth Proportional to 220,624.94, 330,957.11 and 85,685.78

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Solution

The fourth proportional to 220,624.94, 330,957.11 and 85,685.78 is: 128,536.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,624.94 : 330,957.11 = 85,685.78 : x
  2. Step 2: Convert to fraction form
    220,624.94/330,957.11 = 85,685.78/x
  3. Step 3: Cross multiply
    220,624.94x = 330,957.11 × 85,685.78
  4. Step 4: Simplify right side
    220,624.94x = 28,358,318,515.86
  5. Step 5: Solve for x
    x = 28,358,318,515.86/220,624.94
  6. Step 6: Final answer
    x = 128,536.33

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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.