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Finding the Fourth Proportional to 253,977.30, 380,953.80 and 85,481.10

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Solution

The fourth proportional to 253,977.30, 380,953.80 and 85,481.10 is: 128,217.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,977.30 : 380,953.80 = 85,481.10 : x
  2. Step 2: Convert to fraction form
    253,977.30/380,953.80 = 85,481.10/x
  3. Step 3: Cross multiply
    253,977.30x = 380,953.80 × 85,481.10
  4. Step 4: Simplify right side
    253,977.30x = 32,564,349,873.18
  5. Step 5: Solve for x
    x = 32,564,349,873.18/253,977.30
  6. Step 6: Final answer
    x = 128,217.56

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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.