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Finding the Fourth Proportional to 66,854.80, 92,206.47 and 56,816.47

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Solution

The fourth proportional to 66,854.80, 92,206.47 and 56,816.47 is: 78,361.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,854.80 : 92,206.47 = 56,816.47 : x
  2. Step 2: Convert to fraction form
    66,854.80/92,206.47 = 56,816.47/x
  3. Step 3: Cross multiply
    66,854.80x = 92,206.47 × 56,816.47
  4. Step 4: Simplify right side
    66,854.80x = 5,238,846,119.11
  5. Step 5: Solve for x
    x = 5,238,846,119.11/66,854.80
  6. Step 6: Final answer
    x = 78,361.56

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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.