Home / 123,311.68-170,169.12-66,721.92

Finding the Fourth Proportional to 123,311.68, 170,169.12 and 66,721.92

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Solution

The fourth proportional to 123,311.68, 170,169.12 and 66,721.92 is: 92,075.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,311.68 : 170,169.12 = 66,721.92 : x
  2. Step 2: Convert to fraction form
    123,311.68/170,169.12 = 66,721.92/x
  3. Step 3: Cross multiply
    123,311.68x = 170,169.12 × 66,721.92
  4. Step 4: Simplify right side
    123,311.68x = 11,354,010,411.11
  5. Step 5: Solve for x
    x = 11,354,010,411.11/123,311.68
  6. Step 6: Final answer
    x = 92,075.71

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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.