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Finding the Fourth Proportional to 172,233.12, 257,864.41 and 129,978.92

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Solution

The fourth proportional to 172,233.12, 257,864.41 and 129,978.92 is: 194,602.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,233.12 : 257,864.41 = 129,978.92 : x
  2. Step 2: Convert to fraction form
    172,233.12/257,864.41 = 129,978.92/x
  3. Step 3: Cross multiply
    172,233.12x = 257,864.41 × 129,978.92
  4. Step 4: Simplify right side
    172,233.12x = 33,516,935,579.02
  5. Step 5: Solve for x
    x = 33,516,935,579.02/172,233.12
  6. Step 6: Final answer
    x = 194,602.15

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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.