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Finding the Fourth Proportional to 133,153.91, 183,751.42 and 72,724.57

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Solution

The fourth proportional to 133,153.91, 183,751.42 and 72,724.57 is: 100,359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,153.91 : 183,751.42 = 72,724.57 : x
  2. Step 2: Convert to fraction form
    133,153.91/183,751.42 = 72,724.57/x
  3. Step 3: Cross multiply
    133,153.91x = 183,751.42 × 72,724.57
  4. Step 4: Simplify right side
    133,153.91x = 13,363,242,501.56
  5. Step 5: Solve for x
    x = 13,363,242,501.56/133,153.91
  6. Step 6: Final answer
    x = 100,359.37

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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.