Home / 123,555.57-170,379.30-105,709.65

Finding the Fourth Proportional to 123,555.57, 170,379.30 and 105,709.65

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Solution

The fourth proportional to 123,555.57, 170,379.30 and 105,709.65 is: 145,770.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,555.57 : 170,379.30 = 105,709.65 : x
  2. Step 2: Convert to fraction form
    123,555.57/170,379.30 = 105,709.65/x
  3. Step 3: Cross multiply
    123,555.57x = 170,379.30 × 105,709.65
  4. Step 4: Simplify right side
    123,555.57x = 18,010,736,170.25
  5. Step 5: Solve for x
    x = 18,010,736,170.25/123,555.57
  6. Step 6: Final answer
    x = 145,770.33

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1.5x scale

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.