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Finding the Fourth Proportional to 79,491.85, 109,697.51 and 43,681.09

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Solution

The fourth proportional to 79,491.85, 109,697.51 and 43,681.09 is: 60,279.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,491.85 : 109,697.51 = 43,681.09 : x
  2. Step 2: Convert to fraction form
    79,491.85/109,697.51 = 43,681.09/x
  3. Step 3: Cross multiply
    79,491.85x = 109,697.51 × 43,681.09
  4. Step 4: Simplify right side
    79,491.85x = 4,791,706,040.19
  5. Step 5: Solve for x
    x = 4,791,706,040.19/79,491.85
  6. Step 6: Final answer
    x = 60,279.22

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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.