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Finding the Fourth Proportional to 219,719.50, 303,245.28 and 139,154.50

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Solution

The fourth proportional to 219,719.50, 303,245.28 and 139,154.50 is: 192,053.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,719.50 : 303,245.28 = 139,154.50 : x
  2. Step 2: Convert to fraction form
    219,719.50/303,245.28 = 139,154.50/x
  3. Step 3: Cross multiply
    219,719.50x = 303,245.28 × 139,154.50
  4. Step 4: Simplify right side
    219,719.50x = 42,197,945,315.76
  5. Step 5: Solve for x
    x = 42,197,945,315.76/219,719.50
  6. Step 6: Final answer
    x = 192,053.71

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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.