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Finding the Fourth Proportional to 66,392.76, 91,711.52 and 61,668.84

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Solution

The fourth proportional to 66,392.76, 91,711.52 and 61,668.84 is: 85,186.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,392.76 : 91,711.52 = 61,668.84 : x
  2. Step 2: Convert to fraction form
    66,392.76/91,711.52 = 61,668.84/x
  3. Step 3: Cross multiply
    66,392.76x = 91,711.52 × 61,668.84
  4. Step 4: Simplify right side
    66,392.76x = 5,655,743,053.04
  5. Step 5: Solve for x
    x = 5,655,743,053.04/66,392.76
  6. Step 6: Final answer
    x = 85,186.14

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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.