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Finding the Fourth Proportional to 172,106.91, 257,607.54 and 91,944.45

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Solution

The fourth proportional to 172,106.91, 257,607.54 and 91,944.45 is: 137,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,106.91 : 257,607.54 = 91,944.45 : x
  2. Step 2: Convert to fraction form
    172,106.91/257,607.54 = 91,944.45/x
  3. Step 3: Cross multiply
    172,106.91x = 257,607.54 × 91,944.45
  4. Step 4: Simplify right side
    172,106.91x = 23,685,583,581.15
  5. Step 5: Solve for x
    x = 23,685,583,581.15/172,106.91
  6. Step 6: Final answer
    x = 137,621.34

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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.