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Finding the Fourth Proportional to 191,894.81, 287,840.19 and 65,533.61

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Solution

The fourth proportional to 191,894.81, 287,840.19 and 65,533.61 is: 98,299.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,894.81 : 287,840.19 = 65,533.61 : x
  2. Step 2: Convert to fraction form
    191,894.81/287,840.19 = 65,533.61/x
  3. Step 3: Cross multiply
    191,894.81x = 287,840.19 × 65,533.61
  4. Step 4: Simplify right side
    191,894.81x = 18,863,206,753.79
  5. Step 5: Solve for x
    x = 18,863,206,753.79/191,894.81
  6. Step 6: Final answer
    x = 98,299.72

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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.