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Finding the Fourth Proportional to 79,220, 109,323.60 and 43,892

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Solution

The fourth proportional to 79,220, 109,323.60 and 43,892 is: 60,570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,220 : 109,323.60 = 43,892 : x
  2. Step 2: Convert to fraction form
    79,220/109,323.60 = 43,892/x
  3. Step 3: Cross multiply
    79,220x = 109,323.60 × 43,892
  4. Step 4: Simplify right side
    79,220x = 4,798,431,451.20
  5. Step 5: Solve for x
    x = 4,798,431,451.20/79,220
  6. Step 6: Final answer
    x = 60,570.96

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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.