Home / 149,404.40-206,175.32-81,421.92

Finding the Fourth Proportional to 149,404.40, 206,175.32 and 81,421.92

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Solution

The fourth proportional to 149,404.40, 206,175.32 and 81,421.92 is: 112,360.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,404.40 : 206,175.32 = 81,421.92 : x
  2. Step 2: Convert to fraction form
    149,404.40/206,175.32 = 81,421.92/x
  3. Step 3: Cross multiply
    149,404.40x = 206,175.32 × 81,421.92
  4. Step 4: Simplify right side
    149,404.40x = 16,787,190,411.01
  5. Step 5: Solve for x
    x = 16,787,190,411.01/149,404.40
  6. Step 6: Final answer
    x = 112,360.75

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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.