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Finding the Fourth Proportional to 143,406.65, 198,103.55 and 114,915.58

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Solution

The fourth proportional to 143,406.65, 198,103.55 and 114,915.58 is: 158,745.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,406.65 : 198,103.55 = 114,915.58 : x
  2. Step 2: Convert to fraction form
    143,406.65/198,103.55 = 114,915.58/x
  3. Step 3: Cross multiply
    143,406.65x = 198,103.55 × 114,915.58
  4. Step 4: Simplify right side
    143,406.65x = 22,765,184,619.52
  5. Step 5: Solve for x
    x = 22,765,184,619.52/143,406.65
  6. Step 6: Final answer
    x = 158,745.66

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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.