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Finding the Fourth Proportional to 92,170.90, 138,310.09 and 38,859.62

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Solution

The fourth proportional to 92,170.90, 138,310.09 and 38,859.62 is: 58,312.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,170.90 : 138,310.09 = 38,859.62 : x
  2. Step 2: Convert to fraction form
    92,170.90/138,310.09 = 38,859.62/x
  3. Step 3: Cross multiply
    92,170.90x = 138,310.09 × 38,859.62
  4. Step 4: Simplify right side
    92,170.90x = 5,374,676,750.87
  5. Step 5: Solve for x
    x = 5,374,676,750.87/92,170.90
  6. Step 6: Final answer
    x = 58,312.08

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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.