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Finding the Fourth Proportional to 133,147.86, 183,743.11 and 72,718.52

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Solution

The fourth proportional to 133,147.86, 183,743.11 and 72,718.52 is: 100,351.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,147.86 : 183,743.11 = 72,718.52 : x
  2. Step 2: Convert to fraction form
    133,147.86/183,743.11 = 72,718.52/x
  3. Step 3: Cross multiply
    133,147.86x = 183,743.11 × 72,718.52
  4. Step 4: Simplify right side
    133,147.86x = 13,361,527,019.40
  5. Step 5: Solve for x
    x = 13,361,527,019.40/133,147.86
  6. Step 6: Final answer
    x = 100,351.05

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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.