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Finding the Fourth Proportional to 208,618.02, 312,802.07 and 66,401.87

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Solution

The fourth proportional to 208,618.02, 312,802.07 and 66,401.87 is: 99,563.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,618.02 : 312,802.07 = 66,401.87 : x
  2. Step 2: Convert to fraction form
    208,618.02/312,802.07 = 66,401.87/x
  3. Step 3: Cross multiply
    208,618.02x = 312,802.07 × 66,401.87
  4. Step 4: Simplify right side
    208,618.02x = 20,770,640,491.85
  5. Step 5: Solve for x
    x = 20,770,640,491.85/208,618.02
  6. Step 6: Final answer
    x = 99,563.02

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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.