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Finding the Fourth Proportional to 103,187.98, 154,755.96 and 39,986.38

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Solution

The fourth proportional to 103,187.98, 154,755.96 and 39,986.38 is: 59,969.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,187.98 : 154,755.96 = 39,986.38 : x
  2. Step 2: Convert to fraction form
    103,187.98/154,755.96 = 39,986.38/x
  3. Step 3: Cross multiply
    103,187.98x = 154,755.96 × 39,986.38
  4. Step 4: Simplify right side
    103,187.98x = 6,188,130,623.82
  5. Step 5: Solve for x
    x = 6,188,130,623.82/103,187.98
  6. Step 6: Final answer
    x = 59,969.49

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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.