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Finding the Fourth Proportional to 219,893.54, 303,485.66 and 139,328.58

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Solution

The fourth proportional to 219,893.54, 303,485.66 and 139,328.58 is: 192,294.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,893.54 : 303,485.66 = 139,328.58 : x
  2. Step 2: Convert to fraction form
    219,893.54/303,485.66 = 139,328.58/x
  3. Step 3: Cross multiply
    219,893.54x = 303,485.66 × 139,328.58
  4. Step 4: Simplify right side
    219,893.54x = 42,284,223,844.09
  5. Step 5: Solve for x
    x = 42,284,223,844.09/219,893.54
  6. Step 6: Final answer
    x = 192,294.07

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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.