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Finding the Fourth Proportional to 92,811.32, 139,219.71 and 22,690.63

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Solution

The fourth proportional to 92,811.32, 139,219.71 and 22,690.63 is: 34,036.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,811.32 : 139,219.71 = 22,690.63 : x
  2. Step 2: Convert to fraction form
    92,811.32/139,219.71 = 22,690.63/x
  3. Step 3: Cross multiply
    92,811.32x = 139,219.71 × 22,690.63
  4. Step 4: Simplify right side
    92,811.32x = 3,158,982,118.77
  5. Step 5: Solve for x
    x = 3,158,982,118.77/92,811.32
  6. Step 6: Final answer
    x = 34,036.61

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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.