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Finding the Fourth Proportional to 79,697.88, 109,985.34 and 43,890.42

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Solution

The fourth proportional to 79,697.88, 109,985.34 and 43,890.42 is: 60,570.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,697.88 : 109,985.34 = 43,890.42 : x
  2. Step 2: Convert to fraction form
    79,697.88/109,985.34 = 43,890.42/x
  3. Step 3: Cross multiply
    79,697.88x = 109,985.34 × 43,890.42
  4. Step 4: Simplify right side
    79,697.88x = 4,827,302,766.44
  5. Step 5: Solve for x
    x = 4,827,302,766.44/79,697.88
  6. Step 6: Final answer
    x = 60,570.03

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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.