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Finding the Fourth Proportional to 109,405.32, 150,975.41 and 61,663.11

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Solution

The fourth proportional to 109,405.32, 150,975.41 and 61,663.11 is: 85,092.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,405.32 : 150,975.41 = 61,663.11 : x
  2. Step 2: Convert to fraction form
    109,405.32/150,975.41 = 61,663.11/x
  3. Step 3: Cross multiply
    109,405.32x = 150,975.41 × 61,663.11
  4. Step 4: Simplify right side
    109,405.32x = 9,309,613,005.81
  5. Step 5: Solve for x
    x = 9,309,613,005.81/109,405.32
  6. Step 6: Final answer
    x = 85,092.87

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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.