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Finding the Fourth Proportional to 189,533.95, 261,447.20 and 122,465.95

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Solution

The fourth proportional to 189,533.95, 261,447.20 and 122,465.95 is: 168,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,533.95 : 261,447.20 = 122,465.95 : x
  2. Step 2: Convert to fraction form
    189,533.95/261,447.20 = 122,465.95/x
  3. Step 3: Cross multiply
    189,533.95x = 261,447.20 × 122,465.95
  4. Step 4: Simplify right side
    189,533.95x = 32,018,379,722.84
  5. Step 5: Solve for x
    x = 32,018,379,722.84/189,533.95
  6. Step 6: Final answer
    x = 168,932.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.