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Finding the Fourth Proportional to 93,138.12, 139,648.74 and 67,846.68

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Solution

The fourth proportional to 93,138.12, 139,648.74 and 67,846.68 is: 101,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.12 : 139,648.74 = 67,846.68 : x
  2. Step 2: Convert to fraction form
    93,138.12/139,648.74 = 67,846.68/x
  3. Step 3: Cross multiply
    93,138.12x = 139,648.74 × 67,846.68
  4. Step 4: Simplify right side
    93,138.12x = 9,474,703,375.18
  5. Step 5: Solve for x
    x = 9,474,703,375.18/93,138.12
  6. Step 6: Final answer
    x = 101,727.45

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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.