Home / 81,869.56-122,860.73-28,561.84

Finding the Fourth Proportional to 81,869.56, 122,860.73 and 28,561.84

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Solution

The fourth proportional to 81,869.56, 122,860.73 and 28,561.84 is: 42,862.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,869.56 : 122,860.73 = 28,561.84 : x
  2. Step 2: Convert to fraction form
    81,869.56/122,860.73 = 28,561.84/x
  3. Step 3: Cross multiply
    81,869.56x = 122,860.73 × 28,561.84
  4. Step 4: Simplify right side
    81,869.56x = 3,509,128,276.80
  5. Step 5: Solve for x
    x = 3,509,128,276.80/81,869.56
  6. Step 6: Final answer
    x = 42,862.43

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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.