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Finding the Fourth Proportional to 139,466.30, 192,455.34 and 75,803.54

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Solution

The fourth proportional to 139,466.30, 192,455.34 and 75,803.54 is: 104,604.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,466.30 : 192,455.34 = 75,803.54 : x
  2. Step 2: Convert to fraction form
    139,466.30/192,455.34 = 75,803.54/x
  3. Step 3: Cross multiply
    139,466.30x = 192,455.34 × 75,803.54
  4. Step 4: Simplify right side
    139,466.30x = 14,588,796,063.90
  5. Step 5: Solve for x
    x = 14,588,796,063.90/139,466.30
  6. Step 6: Final answer
    x = 104,604.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.