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Finding the Fourth Proportional to 79,660.63, 109,918.80 and 45,662.86

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Solution

The fourth proportional to 79,660.63, 109,918.80 and 45,662.86 is: 63,007.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.63 : 109,918.80 = 45,662.86 : x
  2. Step 2: Convert to fraction form
    79,660.63/109,918.80 = 45,662.86/x
  3. Step 3: Cross multiply
    79,660.63x = 109,918.80 × 45,662.86
  4. Step 4: Simplify right side
    79,660.63x = 5,019,206,775.77
  5. Step 5: Solve for x
    x = 5,019,206,775.77/79,660.63
  6. Step 6: Final answer
    x = 63,007.37

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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.