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Finding the Fourth Proportional to 82,705.80, 124,058.70 and 60,414.60

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Solution

The fourth proportional to 82,705.80, 124,058.70 and 60,414.60 is: 90,621.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,705.80 : 124,058.70 = 60,414.60 : x
  2. Step 2: Convert to fraction form
    82,705.80/124,058.70 = 60,414.60/x
  3. Step 3: Cross multiply
    82,705.80x = 124,058.70 × 60,414.60
  4. Step 4: Simplify right side
    82,705.80x = 7,494,956,737.02
  5. Step 5: Solve for x
    x = 7,494,956,737.02/82,705.80
  6. Step 6: Final answer
    x = 90,621.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.