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Finding the Fourth Proportional to 55,471.80, 76,532.37 and 31,581.56

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Solution

The fourth proportional to 55,471.80, 76,532.37 and 31,581.56 is: 43,571.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,471.80 : 76,532.37 = 31,581.56 : x
  2. Step 2: Convert to fraction form
    55,471.80/76,532.37 = 31,581.56/x
  3. Step 3: Cross multiply
    55,471.80x = 76,532.37 × 31,581.56
  4. Step 4: Simplify right side
    55,471.80x = 2,417,011,252.44
  5. Step 5: Solve for x
    x = 2,417,011,252.44/55,471.80
  6. Step 6: Final answer
    x = 43,571.89

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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.