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Finding the Fourth Proportional to 79,109.90, 109,172.41 and 43,300.61

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Solution

The fourth proportional to 79,109.90, 109,172.41 and 43,300.61 is: 59,755.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,109.90 : 109,172.41 = 43,300.61 : x
  2. Step 2: Convert to fraction form
    79,109.90/109,172.41 = 43,300.61/x
  3. Step 3: Cross multiply
    79,109.90x = 109,172.41 × 43,300.61
  4. Step 4: Simplify right side
    79,109.90x = 4,727,231,703.45
  5. Step 5: Solve for x
    x = 4,727,231,703.45/79,109.90
  6. Step 6: Final answer
    x = 59,755.25

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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.