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Finding the Fourth Proportional to 76,480.80, 105,631.80 and 50,945.10

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Solution

The fourth proportional to 76,480.80, 105,631.80 and 50,945.10 is: 70,363.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,480.80 : 105,631.80 = 50,945.10 : x
  2. Step 2: Convert to fraction form
    76,480.80/105,631.80 = 50,945.10/x
  3. Step 3: Cross multiply
    76,480.80x = 105,631.80 × 50,945.10
  4. Step 4: Simplify right side
    76,480.80x = 5,381,422,614.18
  5. Step 5: Solve for x
    x = 5,381,422,614.18/76,480.80
  6. Step 6: Final answer
    x = 70,363.05

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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.