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Finding the Fourth Proportional to 208,289.36, 312,369.30 and 75,152.30

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Solution

The fourth proportional to 208,289.36, 312,369.30 and 75,152.30 is: 112,705.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,289.36 : 312,369.30 = 75,152.30 : x
  2. Step 2: Convert to fraction form
    208,289.36/312,369.30 = 75,152.30/x
  3. Step 3: Cross multiply
    208,289.36x = 312,369.30 × 75,152.30
  4. Step 4: Simplify right side
    208,289.36x = 23,475,269,782.54
  5. Step 5: Solve for x
    x = 23,475,269,782.54/208,289.36
  6. Step 6: Final answer
    x = 112,705.09

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1.5x scale

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.