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Finding the Fourth Proportional to 58,770.82, 81,126.88 and 39,661.91

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Solution

The fourth proportional to 58,770.82, 81,126.88 and 39,661.91 is: 54,749.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,770.82 : 81,126.88 = 39,661.91 : x
  2. Step 2: Convert to fraction form
    58,770.82/81,126.88 = 39,661.91/x
  3. Step 3: Cross multiply
    58,770.82x = 81,126.88 × 39,661.91
  4. Step 4: Simplify right side
    58,770.82x = 3,217,647,013.14
  5. Step 5: Solve for x
    x = 3,217,647,013.14/58,770.82
  6. Step 6: Final answer
    x = 54,749.06

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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.