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Finding the Fourth Proportional to 57,278.80, 85,845.30 and 51,009.40

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Solution

The fourth proportional to 57,278.80, 85,845.30 and 51,009.40 is: 76,449.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,278.80 : 85,845.30 = 51,009.40 : x
  2. Step 2: Convert to fraction form
    57,278.80/85,845.30 = 51,009.40/x
  3. Step 3: Cross multiply
    57,278.80x = 85,845.30 × 51,009.40
  4. Step 4: Simplify right side
    57,278.80x = 4,378,917,245.82
  5. Step 5: Solve for x
    x = 4,378,917,245.82/57,278.80
  6. Step 6: Final answer
    x = 76,449.18

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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.