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Finding the Fourth Proportional to 111,502.81, 153,661.39 and 109,453.24

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Solution

The fourth proportional to 111,502.81, 153,661.39 and 109,453.24 is: 150,836.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,502.81 : 153,661.39 = 109,453.24 : x
  2. Step 2: Convert to fraction form
    111,502.81/153,661.39 = 109,453.24/x
  3. Step 3: Cross multiply
    111,502.81x = 153,661.39 × 109,453.24
  4. Step 4: Simplify right side
    111,502.81x = 16,818,736,998.40
  5. Step 5: Solve for x
    x = 16,818,736,998.40/111,502.81
  6. Step 6: Final answer
    x = 150,836.89

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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.