Home / 143,079.85-214,333.64-86,122.47

Finding the Fourth Proportional to 143,079.85, 214,333.64 and 86,122.47

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Solution

The fourth proportional to 143,079.85, 214,333.64 and 86,122.47 is: 129,011.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,079.85 : 214,333.64 = 86,122.47 : x
  2. Step 2: Convert to fraction form
    143,079.85/214,333.64 = 86,122.47/x
  3. Step 3: Cross multiply
    143,079.85x = 214,333.64 × 86,122.47
  4. Step 4: Simplify right side
    143,079.85x = 18,458,942,480.89
  5. Step 5: Solve for x
    x = 18,458,942,480.89/143,079.85
  6. Step 6: Final answer
    x = 129,011.47

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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.