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Finding the Fourth Proportional to 155,873.72, 215,105.60 and 84,253.74

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Solution

The fourth proportional to 155,873.72, 215,105.60 and 84,253.74 is: 116,270.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,873.72 : 215,105.60 = 84,253.74 : x
  2. Step 2: Convert to fraction form
    155,873.72/215,105.60 = 84,253.74/x
  3. Step 3: Cross multiply
    155,873.72x = 215,105.60 × 84,253.74
  4. Step 4: Simplify right side
    155,873.72x = 18,123,451,294.94
  5. Step 5: Solve for x
    x = 18,123,451,294.94/155,873.72
  6. Step 6: Final answer
    x = 116,270.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.