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Finding the Fourth Proportional to 133,147.11, 183,742.08 and 72,717.78

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Solution

The fourth proportional to 133,147.11, 183,742.08 and 72,717.78 is: 100,350.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,147.11 : 183,742.08 = 72,717.78 : x
  2. Step 2: Convert to fraction form
    133,147.11/183,742.08 = 72,717.78/x
  3. Step 3: Cross multiply
    133,147.11x = 183,742.08 × 72,717.78
  4. Step 4: Simplify right side
    133,147.11x = 13,361,316,150.18
  5. Step 5: Solve for x
    x = 13,361,316,150.18/133,147.11
  6. Step 6: Final answer
    x = 100,350.03

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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.