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Finding the Fourth Proportional to 111,143.13, 153,375.71 and 63,396.33

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Solution

The fourth proportional to 111,143.13, 153,375.71 and 63,396.33 is: 87,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,143.13 : 153,375.71 = 63,396.33 : x
  2. Step 2: Convert to fraction form
    111,143.13/153,375.71 = 63,396.33/x
  3. Step 3: Cross multiply
    111,143.13x = 153,375.71 × 63,396.33
  4. Step 4: Simplify right side
    111,143.13x = 9,723,456,808.16
  5. Step 5: Solve for x
    x = 9,723,456,808.16/111,143.13
  6. Step 6: Final answer
    x = 87,485.90

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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.