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Finding the Fourth Proportional to 78,653.80, 108,519.78 and 50,336.20

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Solution

The fourth proportional to 78,653.80, 108,519.78 and 50,336.20 is: 69,449.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,653.80 : 108,519.78 = 50,336.20 : x
  2. Step 2: Convert to fraction form
    78,653.80/108,519.78 = 50,336.20/x
  3. Step 3: Cross multiply
    78,653.80x = 108,519.78 × 50,336.20
  4. Step 4: Simplify right side
    78,653.80x = 5,462,473,350.04
  5. Step 5: Solve for x
    x = 5,462,473,350.04/78,653.80
  6. Step 6: Final answer
    x = 69,449.58

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1.5x scale

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.