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Finding the Fourth Proportional to 58,751.42, 81,119.10 and 36,120.78

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Solution

The fourth proportional to 58,751.42, 81,119.10 and 36,120.78 is: 49,872.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,751.42 : 81,119.10 = 36,120.78 : x
  2. Step 2: Convert to fraction form
    58,751.42/81,119.10 = 36,120.78/x
  3. Step 3: Cross multiply
    58,751.42x = 81,119.10 × 36,120.78
  4. Step 4: Simplify right side
    58,751.42x = 2,930,085,164.90
  5. Step 5: Solve for x
    x = 2,930,085,164.90/58,751.42
  6. Step 6: Final answer
    x = 49,872.58

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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.