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Finding the Fourth Proportional to 57,697.40, 86,546.10 and 49,921.40

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Solution

The fourth proportional to 57,697.40, 86,546.10 and 49,921.40 is: 74,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,697.40 : 86,546.10 = 49,921.40 : x
  2. Step 2: Convert to fraction form
    57,697.40/86,546.10 = 49,921.40/x
  3. Step 3: Cross multiply
    57,697.40x = 86,546.10 × 49,921.40
  4. Step 4: Simplify right side
    57,697.40x = 4,320,502,476.54
  5. Step 5: Solve for x
    x = 4,320,502,476.54/57,697.40
  6. Step 6: Final answer
    x = 74,882.10

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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.