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Finding the Fourth Proportional to 191,638.61, 287,251.52 and 91,586.09

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Solution

The fourth proportional to 191,638.61, 287,251.52 and 91,586.09 is: 137,280.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,638.61 : 287,251.52 = 91,586.09 : x
  2. Step 2: Convert to fraction form
    191,638.61/287,251.52 = 91,586.09/x
  3. Step 3: Cross multiply
    191,638.61x = 287,251.52 × 91,586.09
  4. Step 4: Simplify right side
    191,638.61x = 26,308,243,823.56
  5. Step 5: Solve for x
    x = 26,308,243,823.56/191,638.61
  6. Step 6: Final answer
    x = 137,280.50

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1.5x scale

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.