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Finding the Fourth Proportional to 219,883.40, 303,446.42 and 129,238.04

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Solution

The fourth proportional to 219,883.40, 303,446.42 and 129,238.04 is: 178,352.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,883.40 : 303,446.42 = 129,238.04 : x
  2. Step 2: Convert to fraction form
    219,883.40/303,446.42 = 129,238.04/x
  3. Step 3: Cross multiply
    219,883.40x = 303,446.42 × 129,238.04
  4. Step 4: Simplify right side
    219,883.40x = 39,216,820,565.82
  5. Step 5: Solve for x
    x = 39,216,820,565.82/219,883.40
  6. Step 6: Final answer
    x = 178,352.80

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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.