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Finding the Fourth Proportional to 191,419.56, 264,161.52 and 105,388.56

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Solution

The fourth proportional to 191,419.56, 264,161.52 and 105,388.56 is: 145,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,419.56 : 264,161.52 = 105,388.56 : x
  2. Step 2: Convert to fraction form
    191,419.56/264,161.52 = 105,388.56/x
  3. Step 3: Cross multiply
    191,419.56x = 264,161.52 × 105,388.56
  4. Step 4: Simplify right side
    191,419.56x = 27,839,602,200.21
  5. Step 5: Solve for x
    x = 27,839,602,200.21/191,419.56
  6. Step 6: Final answer
    x = 145,437.60

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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.