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Finding the Fourth Proportional to 78,663.87, 108,518.92 and 53,179.16

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Solution

The fourth proportional to 78,663.87, 108,518.92 and 53,179.16 is: 73,362.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,663.87 : 108,518.92 = 53,179.16 : x
  2. Step 2: Convert to fraction form
    78,663.87/108,518.92 = 53,179.16/x
  3. Step 3: Cross multiply
    78,663.87x = 108,518.92 × 53,179.16
  4. Step 4: Simplify right side
    78,663.87x = 5,770,944,334.16
  5. Step 5: Solve for x
    x = 5,770,944,334.16/78,663.87
  6. Step 6: Final answer
    x = 73,362.07

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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.