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Finding the Fourth Proportional to 133,479.68, 200,012.16 and 84,128

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Solution

The fourth proportional to 133,479.68, 200,012.16 and 84,128 is: 126,061.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,479.68 : 200,012.16 = 84,128 : x
  2. Step 2: Convert to fraction form
    133,479.68/200,012.16 = 84,128/x
  3. Step 3: Cross multiply
    133,479.68x = 200,012.16 × 84,128
  4. Step 4: Simplify right side
    133,479.68x = 16,826,622,996.48
  5. Step 5: Solve for x
    x = 16,826,622,996.48/133,479.68
  6. Step 6: Final answer
    x = 126,061.31

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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.