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Finding the Fourth Proportional to 86,553.99, 129,067.35 and 83,470.32

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Solution

The fourth proportional to 86,553.99, 129,067.35 and 83,470.32 is: 124,469.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,553.99 : 129,067.35 = 83,470.32 : x
  2. Step 2: Convert to fraction form
    86,553.99/129,067.35 = 83,470.32/x
  3. Step 3: Cross multiply
    86,553.99x = 129,067.35 × 83,470.32
  4. Step 4: Simplify right side
    86,553.99x = 10,773,293,006.05
  5. Step 5: Solve for x
    x = 10,773,293,006.05/86,553.99
  6. Step 6: Final answer
    x = 124,469.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.