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Finding the Fourth Proportional to 207,516.80, 286,361.44 and 122,641.76

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Solution

The fourth proportional to 207,516.80, 286,361.44 and 122,641.76 is: 169,238.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,516.80 : 286,361.44 = 122,641.76 : x
  2. Step 2: Convert to fraction form
    207,516.80/286,361.44 = 122,641.76/x
  3. Step 3: Cross multiply
    207,516.80x = 286,361.44 × 122,641.76
  4. Step 4: Simplify right side
    207,516.80x = 35,119,870,997.73
  5. Step 5: Solve for x
    x = 35,119,870,997.73/207,516.80
  6. Step 6: Final answer
    x = 169,238.69

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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.