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Finding the Fourth Proportional to 215,137.80, 322,706.70 and 155,694.60

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Solution

The fourth proportional to 215,137.80, 322,706.70 and 155,694.60 is: 233,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,137.80 : 322,706.70 = 155,694.60 : x
  2. Step 2: Convert to fraction form
    215,137.80/322,706.70 = 155,694.60/x
  3. Step 3: Cross multiply
    215,137.80x = 322,706.70 × 155,694.60
  4. Step 4: Simplify right side
    215,137.80x = 50,243,690,573.82
  5. Step 5: Solve for x
    x = 50,243,690,573.82/215,137.80
  6. Step 6: Final answer
    x = 233,541.90

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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.