Home / 131,891.74-181,990.01-78,168.08

Finding the Fourth Proportional to 131,891.74, 181,990.01 and 78,168.08

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Solution

The fourth proportional to 131,891.74, 181,990.01 and 78,168.08 is: 107,859.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,891.74 : 181,990.01 = 78,168.08 : x
  2. Step 2: Convert to fraction form
    131,891.74/181,990.01 = 78,168.08/x
  3. Step 3: Cross multiply
    131,891.74x = 181,990.01 × 78,168.08
  4. Step 4: Simplify right side
    131,891.74x = 14,225,810,311.28
  5. Step 5: Solve for x
    x = 14,225,810,311.28/131,891.74
  6. Step 6: Final answer
    x = 107,859.75

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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.