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Finding the Fourth Proportional to 157,638.80, 217,537.44 and 86,019.68

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Solution

The fourth proportional to 157,638.80, 217,537.44 and 86,019.68 is: 118,704.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,638.80 : 217,537.44 = 86,019.68 : x
  2. Step 2: Convert to fraction form
    157,638.80/217,537.44 = 86,019.68/x
  3. Step 3: Cross multiply
    157,638.80x = 217,537.44 × 86,019.68
  4. Step 4: Simplify right side
    157,638.80x = 18,712,500,976.82
  5. Step 5: Solve for x
    x = 18,712,500,976.82/157,638.80
  6. Step 6: Final answer
    x = 118,704.92

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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.