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Finding the Fourth Proportional to 144,930.40, 217,136.40 and 122,639.20

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Solution

The fourth proportional to 144,930.40, 217,136.40 and 122,639.20 is: 183,739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,930.40 : 217,136.40 = 122,639.20 : x
  2. Step 2: Convert to fraction form
    144,930.40/217,136.40 = 122,639.20/x
  3. Step 3: Cross multiply
    144,930.40x = 217,136.40 × 122,639.20
  4. Step 4: Simplify right side
    144,930.40x = 26,629,434,386.88
  5. Step 5: Solve for x
    x = 26,629,434,386.88/144,930.40
  6. Step 6: Final answer
    x = 183,739.47

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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.