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Finding the Fourth Proportional to 219,609.20, 329,938.68 and 140,877.20

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Solution

The fourth proportional to 219,609.20, 329,938.68 and 140,877.20 is: 211,652.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,609.20 : 329,938.68 = 140,877.20 : x
  2. Step 2: Convert to fraction form
    219,609.20/329,938.68 = 140,877.20/x
  3. Step 3: Cross multiply
    219,609.20x = 329,938.68 × 140,877.20
  4. Step 4: Simplify right side
    219,609.20x = 46,480,837,410.10
  5. Step 5: Solve for x
    x = 46,480,837,410.10/219,609.20
  6. Step 6: Final answer
    x = 211,652.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.