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Finding the Fourth Proportional to 191,628.72, 264,447.59 and 105,588.90

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Solution

The fourth proportional to 191,628.72, 264,447.59 and 105,588.90 is: 145,712.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,628.72 : 264,447.59 = 105,588.90 : x
  2. Step 2: Convert to fraction form
    191,628.72/264,447.59 = 105,588.90/x
  3. Step 3: Cross multiply
    191,628.72x = 264,447.59 × 105,588.90
  4. Step 4: Simplify right side
    191,628.72x = 27,922,729,607.81
  5. Step 5: Solve for x
    x = 27,922,729,607.81/191,628.72
  6. Step 6: Final answer
    x = 145,712.66

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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.