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Finding the Fourth Proportional to 115,812.56, 173,740.72 and 39,890.88

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Solution

The fourth proportional to 115,812.56, 173,740.72 and 39,890.88 is: 59,843.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,812.56 : 173,740.72 = 39,890.88 : x
  2. Step 2: Convert to fraction form
    115,812.56/173,740.72 = 39,890.88/x
  3. Step 3: Cross multiply
    115,812.56x = 173,740.72 × 39,890.88
  4. Step 4: Simplify right side
    115,812.56x = 6,930,670,212.63
  5. Step 5: Solve for x
    x = 6,930,670,212.63/115,812.56
  6. Step 6: Final answer
    x = 59,843.86

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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.