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Finding the Fourth Proportional to 157,900.39, 217,899.92 and 86,278.77

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Solution

The fourth proportional to 157,900.39, 217,899.92 and 86,278.77 is: 119,063.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,900.39 : 217,899.92 = 86,278.77 : x
  2. Step 2: Convert to fraction form
    157,900.39/217,899.92 = 86,278.77/x
  3. Step 3: Cross multiply
    157,900.39x = 217,899.92 × 86,278.77
  4. Step 4: Simplify right side
    157,900.39x = 18,800,137,296.40
  5. Step 5: Solve for x
    x = 18,800,137,296.40/157,900.39
  6. Step 6: Final answer
    x = 119,063.28

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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.