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Finding the Fourth Proportional to 191,508.84, 287,139.87 and 91,666.62

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Solution

The fourth proportional to 191,508.84, 287,139.87 and 91,666.62 is: 137,440.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,508.84 : 287,139.87 = 91,666.62 : x
  2. Step 2: Convert to fraction form
    191,508.84/287,139.87 = 91,666.62/x
  3. Step 3: Cross multiply
    191,508.84x = 287,139.87 × 91,666.62
  4. Step 4: Simplify right side
    191,508.84x = 26,321,141,350.14
  5. Step 5: Solve for x
    x = 26,321,141,350.14/191,508.84
  6. Step 6: Final answer
    x = 137,440.87

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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.