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Finding the Fourth Proportional to 285,616.80, 428,425.20 and 108,129.60

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Solution

The fourth proportional to 285,616.80, 428,425.20 and 108,129.60 is: 162,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,616.80 : 428,425.20 = 108,129.60 : x
  2. Step 2: Convert to fraction form
    285,616.80/428,425.20 = 108,129.60/x
  3. Step 3: Cross multiply
    285,616.80x = 428,425.20 × 108,129.60
  4. Step 4: Simplify right side
    285,616.80x = 46,325,445,505.92
  5. Step 5: Solve for x
    x = 46,325,445,505.92/285,616.80
  6. Step 6: Final answer
    x = 162,194.40

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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.