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Finding the Fourth Proportional to 66,790, 92,180.61 and 38,109.62

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Solution

The fourth proportional to 66,790, 92,180.61 and 38,109.62 is: 52,597.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,790 : 92,180.61 = 38,109.62 : x
  2. Step 2: Convert to fraction form
    66,790/92,180.61 = 38,109.62/x
  3. Step 3: Cross multiply
    66,790x = 92,180.61 × 38,109.62
  4. Step 4: Simplify right side
    66,790x = 3,512,968,018.47
  5. Step 5: Solve for x
    x = 3,512,968,018.47/66,790
  6. Step 6: Final answer
    x = 52,597.22

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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.