Home / 102,911.90-154,367.85-85,999.10

Finding the Fourth Proportional to 102,911.90, 154,367.85 and 85,999.10

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Solution

The fourth proportional to 102,911.90, 154,367.85 and 85,999.10 is: 128,998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,911.90 : 154,367.85 = 85,999.10 : x
  2. Step 2: Convert to fraction form
    102,911.90/154,367.85 = 85,999.10/x
  3. Step 3: Cross multiply
    102,911.90x = 154,367.85 × 85,999.10
  4. Step 4: Simplify right side
    102,911.90x = 13,275,496,168.94
  5. Step 5: Solve for x
    x = 13,275,496,168.94/102,911.90
  6. Step 6: Final answer
    x = 128,998.65

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Double scale
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Similar ratio
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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.