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Finding the Fourth Proportional to 111,644.73, 153,619.54 and 108,987.53

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Solution

The fourth proportional to 111,644.73, 153,619.54 and 108,987.53 is: 149,963.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,644.73 : 153,619.54 = 108,987.53 : x
  2. Step 2: Convert to fraction form
    111,644.73/153,619.54 = 108,987.53/x
  3. Step 3: Cross multiply
    111,644.73x = 153,619.54 × 108,987.53
  4. Step 4: Simplify right side
    111,644.73x = 16,742,613,183.77
  5. Step 5: Solve for x
    x = 16,742,613,183.77/111,644.73
  6. Step 6: Final answer
    x = 149,963.31

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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.