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Finding the Fourth Proportional to 78,304.92, 108,007.26 and 49,997.85

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Solution

The fourth proportional to 78,304.92, 108,007.26 and 49,997.85 is: 68,962.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,304.92 : 108,007.26 = 49,997.85 : x
  2. Step 2: Convert to fraction form
    78,304.92/108,007.26 = 49,997.85/x
  3. Step 3: Cross multiply
    78,304.92x = 108,007.26 × 49,997.85
  4. Step 4: Simplify right side
    78,304.92x = 5,400,130,784.39
  5. Step 5: Solve for x
    x = 5,400,130,784.39/78,304.92
  6. Step 6: Final answer
    x = 68,962.85

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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.