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Finding the Fourth Proportional to 133,406.80, 199,672.80 and 103,663.60

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Solution

The fourth proportional to 133,406.80, 199,672.80 and 103,663.60 is: 155,155.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,406.80 : 199,672.80 = 103,663.60 : x
  2. Step 2: Convert to fraction form
    133,406.80/199,672.80 = 103,663.60/x
  3. Step 3: Cross multiply
    133,406.80x = 199,672.80 × 103,663.60
  4. Step 4: Simplify right side
    133,406.80x = 20,698,801,270.08
  5. Step 5: Solve for x
    x = 20,698,801,270.08/133,406.80
  6. Step 6: Final answer
    x = 155,155.52

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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.