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Finding the Fourth Proportional to 109,171.96, 150,655.56 and 61,425.28

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Solution

The fourth proportional to 109,171.96, 150,655.56 and 61,425.28 is: 84,765.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,171.96 : 150,655.56 = 61,425.28 : x
  2. Step 2: Convert to fraction form
    109,171.96/150,655.56 = 61,425.28/x
  3. Step 3: Cross multiply
    109,171.96x = 150,655.56 × 61,425.28
  4. Step 4: Simplify right side
    109,171.96x = 9,254,059,956.56
  5. Step 5: Solve for x
    x = 9,254,059,956.56/109,171.96
  6. Step 6: Final answer
    x = 84,765.90

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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.