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Finding the Fourth Proportional to 191,716.96, 287,379.60 and 66,955.36

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Solution

The fourth proportional to 191,716.96, 287,379.60 and 66,955.36 is: 100,364.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,716.96 : 287,379.60 = 66,955.36 : x
  2. Step 2: Convert to fraction form
    191,716.96/287,379.60 = 66,955.36/x
  3. Step 3: Cross multiply
    191,716.96x = 287,379.60 × 66,955.36
  4. Step 4: Simplify right side
    191,716.96x = 19,241,604,574.66
  5. Step 5: Solve for x
    x = 19,241,604,574.66/191,716.96
  6. Step 6: Final answer
    x = 100,364.64

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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.