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Finding the Fourth Proportional to 79,681.26, 109,958.94 and 47,438.40

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Solution

The fourth proportional to 79,681.26, 109,958.94 and 47,438.40 is: 65,464.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,681.26 : 109,958.94 = 47,438.40 : x
  2. Step 2: Convert to fraction form
    79,681.26/109,958.94 = 47,438.40/x
  3. Step 3: Cross multiply
    79,681.26x = 109,958.94 × 47,438.40
  4. Step 4: Simplify right side
    79,681.26x = 5,216,276,179.30
  5. Step 5: Solve for x
    x = 5,216,276,179.30/79,681.26
  6. Step 6: Final answer
    x = 65,464.28

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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.