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Finding the Fourth Proportional to 219,718, 303,243.20 and 139,153

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Solution

The fourth proportional to 219,718, 303,243.20 and 139,153 is: 192,051.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,718 : 303,243.20 = 139,153 : x
  2. Step 2: Convert to fraction form
    219,718/303,243.20 = 139,153/x
  3. Step 3: Cross multiply
    219,718x = 303,243.20 × 139,153
  4. Step 4: Simplify right side
    219,718x = 42,197,201,009.60
  5. Step 5: Solve for x
    x = 42,197,201,009.60/219,718
  6. Step 6: Final answer
    x = 192,051.63

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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.