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Finding the Fourth Proportional to 109,170.87, 150,655.52 and 61,424.28

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Solution

The fourth proportional to 109,170.87, 150,655.52 and 61,424.28 is: 84,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,170.87 : 150,655.52 = 61,424.28 : x
  2. Step 2: Convert to fraction form
    109,170.87/150,655.52 = 61,424.28/x
  3. Step 3: Cross multiply
    109,170.87x = 150,655.52 × 61,424.28
  4. Step 4: Simplify right side
    109,170.87x = 9,253,906,536.90
  5. Step 5: Solve for x
    x = 9,253,906,536.90/109,170.87
  6. Step 6: Final answer
    x = 84,765.35

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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.