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Finding the Fourth Proportional to 143,406.65, 214,916.15 and 54,611.71

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Solution

The fourth proportional to 143,406.65, 214,916.15 and 54,611.71 is: 81,843.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,406.65 : 214,916.15 = 54,611.71 : x
  2. Step 2: Convert to fraction form
    143,406.65/214,916.15 = 54,611.71/x
  3. Step 3: Cross multiply
    143,406.65x = 214,916.15 × 54,611.71
  4. Step 4: Simplify right side
    143,406.65x = 11,736,938,458.12
  5. Step 5: Solve for x
    x = 11,736,938,458.12/143,406.65
  6. Step 6: Final answer
    x = 81,843.75

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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.