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Finding the Fourth Proportional to 223,136.80, 334,705.20 and 128,658.40

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Solution

The fourth proportional to 223,136.80, 334,705.20 and 128,658.40 is: 192,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,136.80 : 334,705.20 = 128,658.40 : x
  2. Step 2: Convert to fraction form
    223,136.80/334,705.20 = 128,658.40/x
  3. Step 3: Cross multiply
    223,136.80x = 334,705.20 × 128,658.40
  4. Step 4: Simplify right side
    223,136.80x = 43,062,635,503.68
  5. Step 5: Solve for x
    x = 43,062,635,503.68/223,136.80
  6. Step 6: Final answer
    x = 192,987.60

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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.