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Finding the Fourth Proportional to 83,345.98, 115,007.34 and 66,393.40

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Solution

The fourth proportional to 83,345.98, 115,007.34 and 66,393.40 is: 91,614.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,345.98 : 115,007.34 = 66,393.40 : x
  2. Step 2: Convert to fraction form
    83,345.98/115,007.34 = 66,393.40/x
  3. Step 3: Cross multiply
    83,345.98x = 115,007.34 × 66,393.40
  4. Step 4: Simplify right side
    83,345.98x = 7,635,728,327.56
  5. Step 5: Solve for x
    x = 7,635,728,327.56/83,345.98
  6. Step 6: Final answer
    x = 91,614.84

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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.