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Finding the Fourth Proportional to 157,855.76, 217,844.16 and 86,240.42

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Solution

The fourth proportional to 157,855.76, 217,844.16 and 86,240.42 is: 119,013.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,855.76 : 217,844.16 = 86,240.42 : x
  2. Step 2: Convert to fraction form
    157,855.76/217,844.16 = 86,240.42/x
  3. Step 3: Cross multiply
    157,855.76x = 217,844.16 × 86,240.42
  4. Step 4: Simplify right side
    157,855.76x = 18,786,971,852.95
  5. Step 5: Solve for x
    x = 18,786,971,852.95/157,855.76
  6. Step 6: Final answer
    x = 119,013.53

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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.