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Finding the Fourth Proportional to 172,900.16, 258,882.60 and 89,619.20

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Solution

The fourth proportional to 172,900.16, 258,882.60 and 89,619.20 is: 134,186.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,900.16 : 258,882.60 = 89,619.20 : x
  2. Step 2: Convert to fraction form
    172,900.16/258,882.60 = 89,619.20/x
  3. Step 3: Cross multiply
    172,900.16x = 258,882.60 × 89,619.20
  4. Step 4: Simplify right side
    172,900.16x = 23,200,851,505.92
  5. Step 5: Solve for x
    x = 23,200,851,505.92/172,900.16
  6. Step 6: Final answer
    x = 134,186.41

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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.