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Finding the Fourth Proportional to 191,534.80, 287,351.60 and 91,771.96

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Solution

The fourth proportional to 191,534.80, 287,351.60 and 91,771.96 is: 137,681.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,534.80 : 287,351.60 = 91,771.96 : x
  2. Step 2: Convert to fraction form
    191,534.80/287,351.60 = 91,771.96/x
  3. Step 3: Cross multiply
    191,534.80x = 287,351.60 × 91,771.96
  4. Step 4: Simplify right side
    191,534.80x = 26,370,819,541.14
  5. Step 5: Solve for x
    x = 26,370,819,541.14/191,534.80
  6. Step 6: Final answer
    x = 137,681.61

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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.