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Finding the Fourth Proportional to 191,356.09, 287,035.58 and 66,697.21

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Solution

The fourth proportional to 191,356.09, 287,035.58 and 66,697.21 is: 100,046.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,356.09 : 287,035.58 = 66,697.21 : x
  2. Step 2: Convert to fraction form
    191,356.09/287,035.58 = 66,697.21/x
  3. Step 3: Cross multiply
    191,356.09x = 287,035.58 × 66,697.21
  4. Step 4: Simplify right side
    191,356.09x = 19,144,472,023.25
  5. Step 5: Solve for x
    x = 19,144,472,023.25/191,356.09
  6. Step 6: Final answer
    x = 100,046.32

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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.