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Finding the Fourth Proportional to 143,174.82, 197,583.66 and 78,650.04

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Solution

The fourth proportional to 143,174.82, 197,583.66 and 78,650.04 is: 108,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,174.82 : 197,583.66 = 78,650.04 : x
  2. Step 2: Convert to fraction form
    143,174.82/197,583.66 = 78,650.04/x
  3. Step 3: Cross multiply
    143,174.82x = 197,583.66 × 78,650.04
  4. Step 4: Simplify right side
    143,174.82x = 15,539,962,762.35
  5. Step 5: Solve for x
    x = 15,539,962,762.35/143,174.82
  6. Step 6: Final answer
    x = 108,538.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.