Home / 143,078.85-214,332.14-86,121.47

Finding the Fourth Proportional to 143,078.85, 214,332.14 and 86,121.47

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Solution

The fourth proportional to 143,078.85, 214,332.14 and 86,121.47 is: 129,009.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,078.85 : 214,332.14 = 86,121.47 : x
  2. Step 2: Convert to fraction form
    143,078.85/214,332.14 = 86,121.47/x
  3. Step 3: Cross multiply
    143,078.85x = 214,332.14 × 86,121.47
  4. Step 4: Simplify right side
    143,078.85x = 18,458,599,984.10
  5. Step 5: Solve for x
    x = 18,458,599,984.10/143,078.85
  6. Step 6: Final answer
    x = 129,009.98

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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.