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Finding the Fourth Proportional to 189,611.59, 261,662.23 and 103,570.55

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Solution

The fourth proportional to 189,611.59, 261,662.23 and 103,570.55 is: 142,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,611.59 : 261,662.23 = 103,570.55 : x
  2. Step 2: Convert to fraction form
    189,611.59/261,662.23 = 103,570.55/x
  3. Step 3: Cross multiply
    189,611.59x = 261,662.23 × 103,570.55
  4. Step 4: Simplify right side
    189,611.59x = 27,100,501,075.33
  5. Step 5: Solve for x
    x = 27,100,501,075.33/189,611.59
  6. Step 6: Final answer
    x = 142,926.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.