Home / 149,385.78-206,149.75-81,403.25

Finding the Fourth Proportional to 149,385.78, 206,149.75 and 81,403.25

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Solution

The fourth proportional to 149,385.78, 206,149.75 and 81,403.25 is: 112,335.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,385.78 : 206,149.75 = 81,403.25 : x
  2. Step 2: Convert to fraction form
    149,385.78/206,149.75 = 81,403.25/x
  3. Step 3: Cross multiply
    149,385.78x = 206,149.75 × 81,403.25
  4. Step 4: Simplify right side
    149,385.78x = 16,781,258,402.43
  5. Step 5: Solve for x
    x = 16,781,258,402.43/149,385.78
  6. Step 6: Final answer
    x = 112,335.05

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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.