Home / 427,585.16-641,197.30-128,108.32

Finding the Fourth Proportional to 427,585.16, 641,197.30 and 128,108.32

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Solution

The fourth proportional to 427,585.16, 641,197.30 and 128,108.32 is: 192,108.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,585.16 : 641,197.30 = 128,108.32 : x
  2. Step 2: Convert to fraction form
    427,585.16/641,197.30 = 128,108.32/x
  3. Step 3: Cross multiply
    427,585.16x = 641,197.30 × 128,108.32
  4. Step 4: Simplify right side
    427,585.16x = 82,142,708,891.54
  5. Step 5: Solve for x
    x = 82,142,708,891.54/427,585.16
  6. Step 6: Final answer
    x = 192,108.42

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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.