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Finding the Fourth Proportional to 103,605.56, 155,408.31 and 68,537.02

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Solution

The fourth proportional to 103,605.56, 155,408.31 and 68,537.02 is: 102,805.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,605.56 : 155,408.31 = 68,537.02 : x
  2. Step 2: Convert to fraction form
    103,605.56/155,408.31 = 68,537.02/x
  3. Step 3: Cross multiply
    103,605.56x = 155,408.31 × 68,537.02
  4. Step 4: Simplify right side
    103,605.56x = 10,651,221,673.59
  5. Step 5: Solve for x
    x = 10,651,221,673.59/103,605.56
  6. Step 6: Final answer
    x = 102,805.50

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1.5x scale

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.