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Finding the Fourth Proportional to 91,454.40, 137,181.60 and 81,777.60

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Solution

The fourth proportional to 91,454.40, 137,181.60 and 81,777.60 is: 122,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,454.40 : 137,181.60 = 81,777.60 : x
  2. Step 2: Convert to fraction form
    91,454.40/137,181.60 = 81,777.60/x
  3. Step 3: Cross multiply
    91,454.40x = 137,181.60 × 81,777.60
  4. Step 4: Simplify right side
    91,454.40x = 11,218,382,012.16
  5. Step 5: Solve for x
    x = 11,218,382,012.16/91,454.40
  6. Step 6: Final answer
    x = 122,666.40

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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.