Home / 220,920.75-331,178.65-86,075.80

Finding the Fourth Proportional to 220,920.75, 331,178.65 and 86,075.80

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Solution

The fourth proportional to 220,920.75, 331,178.65 and 86,075.80 is: 129,034.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,920.75 : 331,178.65 = 86,075.80 : x
  2. Step 2: Convert to fraction form
    220,920.75/331,178.65 = 86,075.80/x
  3. Step 3: Cross multiply
    220,920.75x = 331,178.65 × 86,075.80
  4. Step 4: Simplify right side
    220,920.75x = 28,506,466,198.53
  5. Step 5: Solve for x
    x = 28,506,466,198.53/220,920.75
  6. Step 6: Final answer
    x = 129,034.81

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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.