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Finding the Fourth Proportional to 171,389.28, 256,985.28 and 66,194.40

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Solution

The fourth proportional to 171,389.28, 256,985.28 and 66,194.40 is: 99,253.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,389.28 : 256,985.28 = 66,194.40 : x
  2. Step 2: Convert to fraction form
    171,389.28/256,985.28 = 66,194.40/x
  3. Step 3: Cross multiply
    171,389.28x = 256,985.28 × 66,194.40
  4. Step 4: Simplify right side
    171,389.28x = 17,010,986,418.43
  5. Step 5: Solve for x
    x = 17,010,986,418.43/171,389.28
  6. Step 6: Final answer
    x = 99,253.50

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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.