Home / 143,986.80-215,979.28-77,458.26

Finding the Fourth Proportional to 143,986.80, 215,979.28 and 77,458.26

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Solution

The fourth proportional to 143,986.80, 215,979.28 and 77,458.26 is: 116,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,986.80 : 215,979.28 = 77,458.26 : x
  2. Step 2: Convert to fraction form
    143,986.80/215,979.28 = 77,458.26/x
  3. Step 3: Cross multiply
    143,986.80x = 215,979.28 × 77,458.26
  4. Step 4: Simplify right side
    143,986.80x = 16,729,379,224.85
  5. Step 5: Solve for x
    x = 16,729,379,224.85/143,986.80
  6. Step 6: Final answer
    x = 116,186.90

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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.