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Finding the Fourth Proportional to 219,884.40, 303,447.80 and 129,239.04

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Solution

The fourth proportional to 219,884.40, 303,447.80 and 129,239.04 is: 178,354.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,884.40 : 303,447.80 = 129,239.04 : x
  2. Step 2: Convert to fraction form
    219,884.40/303,447.80 = 129,239.04/x
  3. Step 3: Cross multiply
    219,884.40x = 303,447.80 × 129,239.04
  4. Step 4: Simplify right side
    219,884.40x = 39,217,302,362.11
  5. Step 5: Solve for x
    x = 39,217,302,362.11/219,884.40
  6. Step 6: Final answer
    x = 178,354.18

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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.