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Finding the Fourth Proportional to 218,816.60, 328,235.70 and 113,840.60

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Solution

The fourth proportional to 218,816.60, 328,235.70 and 113,840.60 is: 170,766.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,816.60 : 328,235.70 = 113,840.60 : x
  2. Step 2: Convert to fraction form
    218,816.60/328,235.70 = 113,840.60/x
  3. Step 3: Cross multiply
    218,816.60x = 328,235.70 × 113,840.60
  4. Step 4: Simplify right side
    218,816.60x = 37,366,549,029.42
  5. Step 5: Solve for x
    x = 37,366,549,029.42/218,816.60
  6. Step 6: Final answer
    x = 170,766.52

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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.