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Finding the Fourth Proportional to 143,812.80, 215,557.20 and 68,968.80

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Solution

The fourth proportional to 143,812.80, 215,557.20 and 68,968.80 is: 103,375.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,812.80 : 215,557.20 = 68,968.80 : x
  2. Step 2: Convert to fraction form
    143,812.80/215,557.20 = 68,968.80/x
  3. Step 3: Cross multiply
    143,812.80x = 215,557.20 × 68,968.80
  4. Step 4: Simplify right side
    143,812.80x = 14,866,721,415.36
  5. Step 5: Solve for x
    x = 14,866,721,415.36/143,812.80
  6. Step 6: Final answer
    x = 103,375.51

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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.