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Finding the Fourth Proportional to 111,424.92, 153,776.90 and 63,669

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Solution

The fourth proportional to 111,424.92, 153,776.90 and 63,669 is: 87,869.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,424.92 : 153,776.90 = 63,669 : x
  2. Step 2: Convert to fraction form
    111,424.92/153,776.90 = 63,669/x
  3. Step 3: Cross multiply
    111,424.92x = 153,776.90 × 63,669
  4. Step 4: Simplify right side
    111,424.92x = 9,790,821,446.10
  5. Step 5: Solve for x
    x = 9,790,821,446.10/111,424.92
  6. Step 6: Final answer
    x = 87,869.23

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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.