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Finding the Fourth Proportional to 78,866.73, 108,836.46 and 43,056.90

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Solution

The fourth proportional to 78,866.73, 108,836.46 and 43,056.90 is: 59,418.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,866.73 : 108,836.46 = 43,056.90 : x
  2. Step 2: Convert to fraction form
    78,866.73/108,836.46 = 43,056.90/x
  3. Step 3: Cross multiply
    78,866.73x = 108,836.46 × 43,056.90
  4. Step 4: Simplify right side
    78,866.73x = 4,686,160,574.57
  5. Step 5: Solve for x
    x = 4,686,160,574.57/78,866.73
  6. Step 6: Final answer
    x = 59,418.73

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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.