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Finding the Fourth Proportional to 91,906.80, 137,714.40 and 60,705.60

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Solution

The fourth proportional to 91,906.80, 137,714.40 and 60,705.60 is: 90,962.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,906.80 : 137,714.40 = 60,705.60 : x
  2. Step 2: Convert to fraction form
    91,906.80/137,714.40 = 60,705.60/x
  3. Step 3: Cross multiply
    91,906.80x = 137,714.40 × 60,705.60
  4. Step 4: Simplify right side
    91,906.80x = 8,360,035,280.64
  5. Step 5: Solve for x
    x = 8,360,035,280.64/91,906.80
  6. Step 6: Final answer
    x = 90,962.10

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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.