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Finding the Fourth Proportional to 83,818.16, 115,549.88 and 66,672.08

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Solution

The fourth proportional to 83,818.16, 115,549.88 and 66,672.08 is: 91,912.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,818.16 : 115,549.88 = 66,672.08 : x
  2. Step 2: Convert to fraction form
    83,818.16/115,549.88 = 66,672.08/x
  3. Step 3: Cross multiply
    83,818.16x = 115,549.88 × 66,672.08
  4. Step 4: Simplify right side
    83,818.16x = 7,703,950,843.35
  5. Step 5: Solve for x
    x = 7,703,950,843.35/83,818.16
  6. Step 6: Final answer
    x = 91,912.67

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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.