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Finding the Fourth Proportional to 219,897.79, 303,491.51 and 139,332.81

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Solution

The fourth proportional to 219,897.79, 303,491.51 and 139,332.81 is: 192,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,897.79 : 303,491.51 = 139,332.81 : x
  2. Step 2: Convert to fraction form
    219,897.79/303,491.51 = 139,332.81/x
  3. Step 3: Cross multiply
    219,897.79x = 303,491.51 × 139,332.81
  4. Step 4: Simplify right side
    219,897.79x = 42,286,324,156.23
  5. Step 5: Solve for x
    x = 42,286,324,156.23/219,897.79
  6. Step 6: Final answer
    x = 192,299.91

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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.