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Finding the Fourth Proportional to 215,937.80, 323,906.70 and 66,176.90

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Solution

The fourth proportional to 215,937.80, 323,906.70 and 66,176.90 is: 99,265.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,937.80 : 323,906.70 = 66,176.90 : x
  2. Step 2: Convert to fraction form
    215,937.80/323,906.70 = 66,176.90/x
  3. Step 3: Cross multiply
    215,937.80x = 323,906.70 × 66,176.90
  4. Step 4: Simplify right side
    215,937.80x = 21,435,141,295.23
  5. Step 5: Solve for x
    x = 21,435,141,295.23/215,937.80
  6. Step 6: Final answer
    x = 99,265.35

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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.