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Finding the Fourth Proportional to 79,639.92, 109,904.28 and 45,651.36

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Solution

The fourth proportional to 79,639.92, 109,904.28 and 45,651.36 is: 62,999.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,639.92 : 109,904.28 = 45,651.36 : x
  2. Step 2: Convert to fraction form
    79,639.92/109,904.28 = 45,651.36/x
  3. Step 3: Cross multiply
    79,639.92x = 109,904.28 × 45,651.36
  4. Step 4: Simplify right side
    79,639.92x = 5,017,279,851.82
  5. Step 5: Solve for x
    x = 5,017,279,851.82/79,639.92
  6. Step 6: Final answer
    x = 62,999.56

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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.