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Finding the Fourth Proportional to 215,607.44, 323,445.72 and 90,966.80

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Solution

The fourth proportional to 215,607.44, 323,445.72 and 90,966.80 is: 136,464.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,607.44 : 323,445.72 = 90,966.80 : x
  2. Step 2: Convert to fraction form
    215,607.44/323,445.72 = 90,966.80/x
  3. Step 3: Cross multiply
    215,607.44x = 323,445.72 × 90,966.80
  4. Step 4: Simplify right side
    215,607.44x = 29,422,822,122.10
  5. Step 5: Solve for x
    x = 29,422,822,122.10/215,607.44
  6. Step 6: Final answer
    x = 136,464.78

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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.