Home / 131,787.40-181,911-80,104.34

Finding the Fourth Proportional to 131,787.40, 181,911 and 80,104.34

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Solution

The fourth proportional to 131,787.40, 181,911 and 80,104.34 is: 110,570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,787.40 : 181,911 = 80,104.34 : x
  2. Step 2: Convert to fraction form
    131,787.40/181,911 = 80,104.34/x
  3. Step 3: Cross multiply
    131,787.40x = 181,911 × 80,104.34
  4. Step 4: Simplify right side
    131,787.40x = 14,571,860,593.74
  5. Step 5: Solve for x
    x = 14,571,860,593.74/131,787.40
  6. Step 6: Final answer
    x = 110,570.97

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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.