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Finding the Fourth Proportional to 86,469.70, 129,615.39 and 62,717.78

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Solution

The fourth proportional to 86,469.70, 129,615.39 and 62,717.78 is: 94,012.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,469.70 : 129,615.39 = 62,717.78 : x
  2. Step 2: Convert to fraction form
    86,469.70/129,615.39 = 62,717.78/x
  3. Step 3: Cross multiply
    86,469.70x = 129,615.39 × 62,717.78
  4. Step 4: Simplify right side
    86,469.70x = 8,129,189,514.63
  5. Step 5: Solve for x
    x = 8,129,189,514.63/86,469.70
  6. Step 6: Final answer
    x = 94,012.00

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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.