Home / 131,111.40-196,812.90-81,247.80

Finding the Fourth Proportional to 131,111.40, 196,812.90 and 81,247.80

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Solution

The fourth proportional to 131,111.40, 196,812.90 and 81,247.80 is: 121,962.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,111.40 : 196,812.90 = 81,247.80 : x
  2. Step 2: Convert to fraction form
    131,111.40/196,812.90 = 81,247.80/x
  3. Step 3: Cross multiply
    131,111.40x = 196,812.90 × 81,247.80
  4. Step 4: Simplify right side
    131,111.40x = 15,990,615,136.62
  5. Step 5: Solve for x
    x = 15,990,615,136.62/131,111.40
  6. Step 6: Final answer
    x = 121,962.05

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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.