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Finding the Fourth Proportional to 219,138.40, 328,448.40 and 113,903.20

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Solution

The fourth proportional to 219,138.40, 328,448.40 and 113,903.20 is: 170,720.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,138.40 : 328,448.40 = 113,903.20 : x
  2. Step 2: Convert to fraction form
    219,138.40/328,448.40 = 113,903.20/x
  3. Step 3: Cross multiply
    219,138.40x = 328,448.40 × 113,903.20
  4. Step 4: Simplify right side
    219,138.40x = 37,411,323,794.88
  5. Step 5: Solve for x
    x = 37,411,323,794.88/219,138.40
  6. Step 6: Final answer
    x = 170,720.07

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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.