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Finding the Fourth Proportional to 153,998.85, 212,516.16 and 86,016.79

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Solution

The fourth proportional to 153,998.85, 212,516.16 and 86,016.79 is: 118,701.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,998.85 : 212,516.16 = 86,016.79 : x
  2. Step 2: Convert to fraction form
    153,998.85/212,516.16 = 86,016.79/x
  3. Step 3: Cross multiply
    153,998.85x = 212,516.16 × 86,016.79
  4. Step 4: Simplify right side
    153,998.85x = 18,279,957,906.33
  5. Step 5: Solve for x
    x = 18,279,957,906.33/153,998.85
  6. Step 6: Final answer
    x = 118,701.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.