Home / 86,716.20-129,977.10-36,787.80

Finding the Fourth Proportional to 86,716.20, 129,977.10 and 36,787.80

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Solution

The fourth proportional to 86,716.20, 129,977.10 and 36,787.80 is: 55,140.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,716.20 : 129,977.10 = 36,787.80 : x
  2. Step 2: Convert to fraction form
    86,716.20/129,977.10 = 36,787.80/x
  3. Step 3: Cross multiply
    86,716.20x = 129,977.10 × 36,787.80
  4. Step 4: Simplify right side
    86,716.20x = 4,781,571,559.38
  5. Step 5: Solve for x
    x = 4,781,571,559.38/86,716.20
  6. Step 6: Final answer
    x = 55,140.46

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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.