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Finding the Fourth Proportional to 55,189.92, 76,155.84 and 31,310.40

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Solution

The fourth proportional to 55,189.92, 76,155.84 and 31,310.40 is: 43,204.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,189.92 : 76,155.84 = 31,310.40 : x
  2. Step 2: Convert to fraction form
    55,189.92/76,155.84 = 31,310.40/x
  3. Step 3: Cross multiply
    55,189.92x = 76,155.84 × 31,310.40
  4. Step 4: Simplify right side
    55,189.92x = 2,384,469,812.74
  5. Step 5: Solve for x
    x = 2,384,469,812.74/55,189.92
  6. Step 6: Final answer
    x = 43,204.81

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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.