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Finding the Fourth Proportional to 218,403.60, 327,605.40 and 129,611.40

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Solution

The fourth proportional to 218,403.60, 327,605.40 and 129,611.40 is: 194,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,403.60 : 327,605.40 = 129,611.40 : x
  2. Step 2: Convert to fraction form
    218,403.60/327,605.40 = 129,611.40/x
  3. Step 3: Cross multiply
    218,403.60x = 327,605.40 × 129,611.40
  4. Step 4: Simplify right side
    218,403.60x = 42,461,394,541.56
  5. Step 5: Solve for x
    x = 42,461,394,541.56/218,403.60
  6. Step 6: Final answer
    x = 194,417.10

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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.