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Finding the Fourth Proportional to 84,570.30, 126,917.01 and 68,128.92

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Solution

The fourth proportional to 84,570.30, 126,917.01 and 68,128.92 is: 102,242.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,570.30 : 126,917.01 = 68,128.92 : x
  2. Step 2: Convert to fraction form
    84,570.30/126,917.01 = 68,128.92/x
  3. Step 3: Cross multiply
    84,570.30x = 126,917.01 × 68,128.92
  4. Step 4: Simplify right side
    84,570.30x = 8,646,718,820.93
  5. Step 5: Solve for x
    x = 8,646,718,820.93/84,570.30
  6. Step 6: Final answer
    x = 102,242.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.