Home / 78,942.98-108,942.87-43,135.20

Finding the Fourth Proportional to 78,942.98, 108,942.87 and 43,135.20

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Solution

The fourth proportional to 78,942.98, 108,942.87 and 43,135.20 is: 59,527.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,942.98 : 108,942.87 = 43,135.20 : x
  2. Step 2: Convert to fraction form
    78,942.98/108,942.87 = 43,135.20/x
  3. Step 3: Cross multiply
    78,942.98x = 108,942.87 × 43,135.20
  4. Step 4: Simplify right side
    78,942.98x = 4,699,272,486.02
  5. Step 5: Solve for x
    x = 4,699,272,486.02/78,942.98
  6. Step 6: Final answer
    x = 59,527.43

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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.