Home / 143,042.81-197,378.94-85,668.69

Finding the Fourth Proportional to 143,042.81, 197,378.94 and 85,668.69

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Solution

The fourth proportional to 143,042.81, 197,378.94 and 85,668.69 is: 118,210.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,042.81 : 197,378.94 = 85,668.69 : x
  2. Step 2: Convert to fraction form
    143,042.81/197,378.94 = 85,668.69/x
  3. Step 3: Cross multiply
    143,042.81x = 197,378.94 × 85,668.69
  4. Step 4: Simplify right side
    143,042.81x = 16,909,194,795.05
  5. Step 5: Solve for x
    x = 16,909,194,795.05/143,042.81
  6. Step 6: Final answer
    x = 118,210.73

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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.