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Finding the Fourth Proportional to 133,057.65, 183,617.91 and 72,628.68

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Solution

The fourth proportional to 133,057.65, 183,617.91 and 72,628.68 is: 100,226.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,057.65 : 183,617.91 = 72,628.68 : x
  2. Step 2: Convert to fraction form
    133,057.65/183,617.91 = 72,628.68/x
  3. Step 3: Cross multiply
    133,057.65x = 183,617.91 × 72,628.68
  4. Step 4: Simplify right side
    133,057.65x = 13,335,926,427.66
  5. Step 5: Solve for x
    x = 13,335,926,427.66/133,057.65
  6. Step 6: Final answer
    x = 100,226.68

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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.