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Finding the Fourth Proportional to 81,551.84, 122,277.47 and 28,231.41

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Solution

The fourth proportional to 81,551.84, 122,277.47 and 28,231.41 is: 42,329.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,551.84 : 122,277.47 = 28,231.41 : x
  2. Step 2: Convert to fraction form
    81,551.84/122,277.47 = 28,231.41/x
  3. Step 3: Cross multiply
    81,551.84x = 122,277.47 × 28,231.41
  4. Step 4: Simplify right side
    81,551.84x = 3,452,065,389.33
  5. Step 5: Solve for x
    x = 3,452,065,389.33/81,551.84
  6. Step 6: Final answer
    x = 42,329.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.