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Finding the Fourth Proportional to 102,650.56, 140,628.92 and 98,812.78

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Solution

The fourth proportional to 102,650.56, 140,628.92 and 98,812.78 is: 135,371.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,650.56 : 140,628.92 = 98,812.78 : x
  2. Step 2: Convert to fraction form
    102,650.56/140,628.92 = 98,812.78/x
  3. Step 3: Cross multiply
    102,650.56x = 140,628.92 × 98,812.78
  4. Step 4: Simplify right side
    102,650.56x = 13,895,933,687.96
  5. Step 5: Solve for x
    x = 13,895,933,687.96/102,650.56
  6. Step 6: Final answer
    x = 135,371.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.