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Finding the Fourth Proportional to 174,661.53, 261,966.78 and 85,891.20

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Solution

The fourth proportional to 174,661.53, 261,966.78 and 85,891.20 is: 128,824.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,661.53 : 261,966.78 = 85,891.20 : x
  2. Step 2: Convert to fraction form
    174,661.53/261,966.78 = 85,891.20/x
  3. Step 3: Cross multiply
    174,661.53x = 261,966.78 × 85,891.20
  4. Step 4: Simplify right side
    174,661.53x = 22,500,641,094.34
  5. Step 5: Solve for x
    x = 22,500,641,094.34/174,661.53
  6. Step 6: Final answer
    x = 128,824.25

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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.