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Finding the Fourth Proportional to 156,662.80, 234,634.20 and 128,669.20

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Solution

The fourth proportional to 156,662.80, 234,634.20 and 128,669.20 is: 192,708.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,662.80 : 234,634.20 = 128,669.20 : x
  2. Step 2: Convert to fraction form
    156,662.80/234,634.20 = 128,669.20/x
  3. Step 3: Cross multiply
    156,662.80x = 234,634.20 × 128,669.20
  4. Step 4: Simplify right side
    156,662.80x = 30,190,194,806.64
  5. Step 5: Solve for x
    x = 30,190,194,806.64/156,662.80
  6. Step 6: Final answer
    x = 192,708.13

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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.