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Finding the Fourth Proportional to 92,709.16, 139,063.68 and 87,976.00

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Solution

The fourth proportional to 92,709.16, 139,063.68 and 87,976.00 is: 131,963.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,709.16 : 139,063.68 = 87,976.00 : x
  2. Step 2: Convert to fraction form
    92,709.16/139,063.68 = 87,976.00/x
  3. Step 3: Cross multiply
    92,709.16x = 139,063.68 × 87,976.00
  4. Step 4: Simplify right side
    92,709.16x = 12,234,266,485.51
  5. Step 5: Solve for x
    x = 12,234,266,485.51/92,709.16
  6. Step 6: Final answer
    x = 131,963.95

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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.