Home / 131,290.12-196,999.44-81,356.86

Finding the Fourth Proportional to 131,290.12, 196,999.44 and 81,356.86

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Solution

The fourth proportional to 131,290.12, 196,999.44 and 81,356.86 is: 122,075.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,290.12 : 196,999.44 = 81,356.86 : x
  2. Step 2: Convert to fraction form
    131,290.12/196,999.44 = 81,356.86/x
  3. Step 3: Cross multiply
    131,290.12x = 196,999.44 × 81,356.86
  4. Step 4: Simplify right side
    131,290.12x = 16,027,255,860.16
  5. Step 5: Solve for x
    x = 16,027,255,860.16/131,290.12
  6. Step 6: Final answer
    x = 122,075.11

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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.