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Finding the Fourth Proportional to 190,699.80, 285,963.30 and 72,331.80

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Solution

The fourth proportional to 190,699.80, 285,963.30 and 72,331.80 is: 108,464.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,699.80 : 285,963.30 = 72,331.80 : x
  2. Step 2: Convert to fraction form
    190,699.80/285,963.30 = 72,331.80/x
  3. Step 3: Cross multiply
    190,699.80x = 285,963.30 × 72,331.80
  4. Step 4: Simplify right side
    190,699.80x = 20,684,240,222.94
  5. Step 5: Solve for x
    x = 20,684,240,222.94/190,699.80
  6. Step 6: Final answer
    x = 108,464.93

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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.