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Finding the Fourth Proportional to 79,580, 109,821.32 and 43,770.60

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Solution

The fourth proportional to 79,580, 109,821.32 and 43,770.60 is: 60,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,580 : 109,821.32 = 43,770.60 : x
  2. Step 2: Convert to fraction form
    79,580/109,821.32 = 43,770.60/x
  3. Step 3: Cross multiply
    79,580x = 109,821.32 × 43,770.60
  4. Step 4: Simplify right side
    79,580x = 4,806,945,069.19
  5. Step 5: Solve for x
    x = 4,806,945,069.19/79,580
  6. Step 6: Final answer
    x = 60,403.93

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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.