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Finding the Fourth Proportional to 78,303.92, 108,005.88 and 49,996.85

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Solution

The fourth proportional to 78,303.92, 108,005.88 and 49,996.85 is: 68,961.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,303.92 : 108,005.88 = 49,996.85 : x
  2. Step 2: Convert to fraction form
    78,303.92/108,005.88 = 49,996.85/x
  3. Step 3: Cross multiply
    78,303.92x = 108,005.88 × 49,996.85
  4. Step 4: Simplify right side
    78,303.92x = 5,399,953,241.45
  5. Step 5: Solve for x
    x = 5,399,953,241.45/78,303.92
  6. Step 6: Final answer
    x = 68,961.47

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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.