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Finding the Fourth Proportional to 209,640.80, 314,461.20 and 168,168.80

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Solution

The fourth proportional to 209,640.80, 314,461.20 and 168,168.80 is: 252,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,640.80 : 314,461.20 = 168,168.80 : x
  2. Step 2: Convert to fraction form
    209,640.80/314,461.20 = 168,168.80/x
  3. Step 3: Cross multiply
    209,640.80x = 314,461.20 × 168,168.80
  4. Step 4: Simplify right side
    209,640.80x = 52,882,562,650.56
  5. Step 5: Solve for x
    x = 52,882,562,650.56/209,640.80
  6. Step 6: Final answer
    x = 252,253.20

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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.