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Finding the Fourth Proportional to 66,502.16, 92,161.28 and 65,240.56

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Solution

The fourth proportional to 66,502.16, 92,161.28 and 65,240.56 is: 90,412.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.16 : 92,161.28 = 65,240.56 : x
  2. Step 2: Convert to fraction form
    66,502.16/92,161.28 = 65,240.56/x
  3. Step 3: Cross multiply
    66,502.16x = 92,161.28 × 65,240.56
  4. Step 4: Simplify right side
    66,502.16x = 6,012,653,517.52
  5. Step 5: Solve for x
    x = 6,012,653,517.52/66,502.16
  6. Step 6: Final answer
    x = 90,412.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.