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Finding the Fourth Proportional to 49,239, 73,796.88 and 21,125.88

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Solution

The fourth proportional to 49,239, 73,796.88 and 21,125.88 is: 31,662.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,239 : 73,796.88 = 21,125.88 : x
  2. Step 2: Convert to fraction form
    49,239/73,796.88 = 21,125.88/x
  3. Step 3: Cross multiply
    49,239x = 73,796.88 × 21,125.88
  4. Step 4: Simplify right side
    49,239x = 1,559,024,031.25
  5. Step 5: Solve for x
    x = 1,559,024,031.25/49,239
  6. Step 6: Final answer
    x = 31,662.38

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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.