Home / 131,821.72-181,912.93-71,390.97

Finding the Fourth Proportional to 131,821.72, 181,912.93 and 71,390.97

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Solution

The fourth proportional to 131,821.72, 181,912.93 and 71,390.97 is: 98,518.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,821.72 : 181,912.93 = 71,390.97 : x
  2. Step 2: Convert to fraction form
    131,821.72/181,912.93 = 71,390.97/x
  3. Step 3: Cross multiply
    131,821.72x = 181,912.93 × 71,390.97
  4. Step 4: Simplify right side
    131,821.72x = 12,986,940,349.76
  5. Step 5: Solve for x
    x = 12,986,940,349.76/131,821.72
  6. Step 6: Final answer
    x = 98,518.97

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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.