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Finding the Fourth Proportional to 208,389.96, 312,399.54 and 75,240.60

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Solution

The fourth proportional to 208,389.96, 312,399.54 and 75,240.60 is: 112,793.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,389.96 : 312,399.54 = 75,240.60 : x
  2. Step 2: Convert to fraction form
    208,389.96/312,399.54 = 75,240.60/x
  3. Step 3: Cross multiply
    208,389.96x = 312,399.54 × 75,240.60
  4. Step 4: Simplify right side
    208,389.96x = 23,505,128,829.32
  5. Step 5: Solve for x
    x = 23,505,128,829.32/208,389.96
  6. Step 6: Final answer
    x = 112,793.96

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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.