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Finding the Fourth Proportional to 67,786.77, 101,679.64 and 20,401.66

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Solution

The fourth proportional to 67,786.77, 101,679.64 and 20,401.66 is: 30,602.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,786.77 : 101,679.64 = 20,401.66 : x
  2. Step 2: Convert to fraction form
    67,786.77/101,679.64 = 20,401.66/x
  3. Step 3: Cross multiply
    67,786.77x = 101,679.64 × 20,401.66
  4. Step 4: Simplify right side
    67,786.77x = 2,074,433,444.20
  5. Step 5: Solve for x
    x = 2,074,433,444.20/67,786.77
  6. Step 6: Final answer
    x = 30,602.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.