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Finding the Fourth Proportional to 55,671.81, 76,724.07 and 39,539.83

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Solution

The fourth proportional to 55,671.81, 76,724.07 and 39,539.83 is: 54,491.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,671.81 : 76,724.07 = 39,539.83 : x
  2. Step 2: Convert to fraction form
    55,671.81/76,724.07 = 39,539.83/x
  3. Step 3: Cross multiply
    55,671.81x = 76,724.07 × 39,539.83
  4. Step 4: Simplify right side
    55,671.81x = 3,033,656,599.69
  5. Step 5: Solve for x
    x = 3,033,656,599.69/55,671.81
  6. Step 6: Final answer
    x = 54,491.79

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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.