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Finding the Fourth Proportional to 66,792.69, 100,157.90 and 38,720.79

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Solution

The fourth proportional to 66,792.69, 100,157.90 and 38,720.79 is: 58,063.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,792.69 : 100,157.90 = 38,720.79 : x
  2. Step 2: Convert to fraction form
    66,792.69/100,157.90 = 38,720.79/x
  3. Step 3: Cross multiply
    66,792.69x = 100,157.90 × 38,720.79
  4. Step 4: Simplify right side
    66,792.69x = 3,878,192,819.14
  5. Step 5: Solve for x
    x = 3,878,192,819.14/66,792.69
  6. Step 6: Final answer
    x = 58,063.13

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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.