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Finding the Fourth Proportional to 207,155.92, 310,668 and 66,881.92

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Solution

The fourth proportional to 207,155.92, 310,668 and 66,881.92 is: 100,301.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,155.92 : 310,668 = 66,881.92 : x
  2. Step 2: Convert to fraction form
    207,155.92/310,668 = 66,881.92/x
  3. Step 3: Cross multiply
    207,155.92x = 310,668 × 66,881.92
  4. Step 4: Simplify right side
    207,155.92x = 20,778,072,322.56
  5. Step 5: Solve for x
    x = 20,778,072,322.56/207,155.92
  6. Step 6: Final answer
    x = 100,301.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.