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Finding the Fourth Proportional to 81,613.83, 112,570.42 and 66,506.52

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Solution

The fourth proportional to 81,613.83, 112,570.42 and 66,506.52 is: 91,732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,613.83 : 112,570.42 = 66,506.52 : x
  2. Step 2: Convert to fraction form
    81,613.83/112,570.42 = 66,506.52/x
  3. Step 3: Cross multiply
    81,613.83x = 112,570.42 × 66,506.52
  4. Step 4: Simplify right side
    81,613.83x = 7,486,666,889.14
  5. Step 5: Solve for x
    x = 7,486,666,889.14/81,613.83
  6. Step 6: Final answer
    x = 91,732.82

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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.