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Finding the Fourth Proportional to 79,422.40, 109,596.08 and 43,612

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Solution

The fourth proportional to 79,422.40, 109,596.08 and 43,612 is: 60,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,422.40 : 109,596.08 = 43,612 : x
  2. Step 2: Convert to fraction form
    79,422.40/109,596.08 = 43,612/x
  3. Step 3: Cross multiply
    79,422.40x = 109,596.08 × 43,612
  4. Step 4: Simplify right side
    79,422.40x = 4,779,704,240.96
  5. Step 5: Solve for x
    x = 4,779,704,240.96/79,422.40
  6. Step 6: Final answer
    x = 60,180.81

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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.