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Finding the Fourth Proportional to 55,645.56, 76,789.71 and 39,756.99

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Solution

The fourth proportional to 55,645.56, 76,789.71 and 39,756.99 is: 54,863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,645.56 : 76,789.71 = 39,756.99 : x
  2. Step 2: Convert to fraction form
    55,645.56/76,789.71 = 39,756.99/x
  3. Step 3: Cross multiply
    55,645.56x = 76,789.71 × 39,756.99
  4. Step 4: Simplify right side
    55,645.56x = 3,052,927,732.57
  5. Step 5: Solve for x
    x = 3,052,927,732.57/55,645.56
  6. Step 6: Final answer
    x = 54,863.82

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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.