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Finding the Fourth Proportional to 100,961.30, 151,429.80 and 41,790.80

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Solution

The fourth proportional to 100,961.30, 151,429.80 and 41,790.80 is: 62,681.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.30 : 151,429.80 = 41,790.80 : x
  2. Step 2: Convert to fraction form
    100,961.30/151,429.80 = 41,790.80/x
  3. Step 3: Cross multiply
    100,961.30x = 151,429.80 × 41,790.80
  4. Step 4: Simplify right side
    100,961.30x = 6,328,372,485.84
  5. Step 5: Solve for x
    x = 6,328,372,485.84/100,961.30
  6. Step 6: Final answer
    x = 62,681.17

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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.