Home / 149,416.03-206,188.86-81,431.65

Finding the Fourth Proportional to 149,416.03, 206,188.86 and 81,431.65

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Solution

The fourth proportional to 149,416.03, 206,188.86 and 81,431.65 is: 112,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,416.03 : 206,188.86 = 81,431.65 : x
  2. Step 2: Convert to fraction form
    149,416.03/206,188.86 = 81,431.65/x
  3. Step 3: Cross multiply
    149,416.03x = 206,188.86 × 81,431.65
  4. Step 4: Simplify right side
    149,416.03x = 16,790,299,081.42
  5. Step 5: Solve for x
    x = 16,790,299,081.42/149,416.03
  6. Step 6: Final answer
    x = 112,372.81

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1.5x scale

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.