Home / 149,395.09-206,162.64-81,412.65

Finding the Fourth Proportional to 149,395.09, 206,162.64 and 81,412.65

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Solution

The fourth proportional to 149,395.09, 206,162.64 and 81,412.65 is: 112,348.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,395.09 : 206,162.64 = 81,412.65 : x
  2. Step 2: Convert to fraction form
    149,395.09/206,162.64 = 81,412.65/x
  3. Step 3: Cross multiply
    149,395.09x = 206,162.64 × 81,412.65
  4. Step 4: Simplify right side
    149,395.09x = 16,784,246,853.40
  5. Step 5: Solve for x
    x = 16,784,246,853.40/149,395.09
  6. Step 6: Final answer
    x = 112,348.05

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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.