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Finding the Fourth Proportional to 109,351.68, 150,905.84 and 61,605.76

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Solution

The fourth proportional to 109,351.68, 150,905.84 and 61,605.76 is: 85,016.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,351.68 : 150,905.84 = 61,605.76 : x
  2. Step 2: Convert to fraction form
    109,351.68/150,905.84 = 61,605.76/x
  3. Step 3: Cross multiply
    109,351.68x = 150,905.84 × 61,605.76
  4. Step 4: Simplify right side
    109,351.68x = 9,296,668,961.64
  5. Step 5: Solve for x
    x = 9,296,668,961.64/109,351.68
  6. Step 6: Final answer
    x = 85,016.24

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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.