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Finding the Fourth Proportional to 143,458.90, 214,929.15 and 122,722.90

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Solution

The fourth proportional to 143,458.90, 214,929.15 and 122,722.90 is: 183,862.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,458.90 : 214,929.15 = 122,722.90 : x
  2. Step 2: Convert to fraction form
    143,458.90/214,929.15 = 122,722.90/x
  3. Step 3: Cross multiply
    143,458.90x = 214,929.15 × 122,722.90
  4. Step 4: Simplify right side
    143,458.90x = 26,376,728,582.54
  5. Step 5: Solve for x
    x = 26,376,728,582.54/143,458.90
  6. Step 6: Final answer
    x = 183,862.62

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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.