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Finding the Fourth Proportional to 220,162.55, 330,139.73 and 85,289.78

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Solution

The fourth proportional to 220,162.55, 330,139.73 and 85,289.78 is: 127,894.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,162.55 : 330,139.73 = 85,289.78 : x
  2. Step 2: Convert to fraction form
    220,162.55/330,139.73 = 85,289.78/x
  3. Step 3: Cross multiply
    220,162.55x = 330,139.73 × 85,289.78
  4. Step 4: Simplify right side
    220,162.55x = 28,157,545,979.53
  5. Step 5: Solve for x
    x = 28,157,545,979.53/220,162.55
  6. Step 6: Final answer
    x = 127,894.35

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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.