Home / 128,138.10-192,207.15-57,060.60

Finding the Fourth Proportional to 128,138.10, 192,207.15 and 57,060.60

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Solution

The fourth proportional to 128,138.10, 192,207.15 and 57,060.60 is: 85,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,138.10 : 192,207.15 = 57,060.60 : x
  2. Step 2: Convert to fraction form
    128,138.10/192,207.15 = 57,060.60/x
  3. Step 3: Cross multiply
    128,138.10x = 192,207.15 × 57,060.60
  4. Step 4: Simplify right side
    128,138.10x = 10,967,455,303.29
  5. Step 5: Solve for x
    x = 10,967,455,303.29/128,138.10
  6. Step 6: Final answer
    x = 85,590.90

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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.