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Finding the Fourth Proportional to 143,603.76, 215,405.76 and 68,706.24

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Solution

The fourth proportional to 143,603.76, 215,405.76 and 68,706.24 is: 103,059.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,603.76 : 215,405.76 = 68,706.24 : x
  2. Step 2: Convert to fraction form
    143,603.76/215,405.76 = 68,706.24/x
  3. Step 3: Cross multiply
    143,603.76x = 215,405.76 × 68,706.24
  4. Step 4: Simplify right side
    143,603.76x = 14,799,719,843.94
  5. Step 5: Solve for x
    x = 14,799,719,843.94/143,603.76
  6. Step 6: Final answer
    x = 103,059.42

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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.