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Finding the Fourth Proportional to 79,254.76, 109,372.80 and 47,425

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Solution

The fourth proportional to 79,254.76, 109,372.80 and 47,425 is: 65,447.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,254.76 : 109,372.80 = 47,425 : x
  2. Step 2: Convert to fraction form
    79,254.76/109,372.80 = 47,425/x
  3. Step 3: Cross multiply
    79,254.76x = 109,372.80 × 47,425
  4. Step 4: Simplify right side
    79,254.76x = 5,187,005,040
  5. Step 5: Solve for x
    x = 5,187,005,040/79,254.76
  6. Step 6: Final answer
    x = 65,447.24

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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.