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Finding the Fourth Proportional to 139,697.28, 192,776.22 and 76,035.60

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Solution

The fourth proportional to 139,697.28, 192,776.22 and 76,035.60 is: 104,925.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,697.28 : 192,776.22 = 76,035.60 : x
  2. Step 2: Convert to fraction form
    139,697.28/192,776.22 = 76,035.60/x
  3. Step 3: Cross multiply
    139,697.28x = 192,776.22 × 76,035.60
  4. Step 4: Simplify right side
    139,697.28x = 14,657,855,553.43
  5. Step 5: Solve for x
    x = 14,657,855,553.43/139,697.28
  6. Step 6: Final answer
    x = 104,925.85

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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.