Home / 149,945.64-206,921.12-81,962.78

Finding the Fourth Proportional to 149,945.64, 206,921.12 and 81,962.78

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Solution

The fourth proportional to 149,945.64, 206,921.12 and 81,962.78 is: 113,106.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,945.64 : 206,921.12 = 81,962.78 : x
  2. Step 2: Convert to fraction form
    149,945.64/206,921.12 = 81,962.78/x
  3. Step 3: Cross multiply
    149,945.64x = 206,921.12 × 81,962.78
  4. Step 4: Simplify right side
    149,945.64x = 16,959,830,235.91
  5. Step 5: Solve for x
    x = 16,959,830,235.91/149,945.64
  6. Step 6: Final answer
    x = 113,106.52

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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.