Home / 103,709.88-155,433.60-66,255.48

Finding the Fourth Proportional to 103,709.88, 155,433.60 and 66,255.48

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Solution

The fourth proportional to 103,709.88, 155,433.60 and 66,255.48 is: 99,299.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,709.88 : 155,433.60 = 66,255.48 : x
  2. Step 2: Convert to fraction form
    103,709.88/155,433.60 = 66,255.48/x
  3. Step 3: Cross multiply
    103,709.88x = 155,433.60 × 66,255.48
  4. Step 4: Simplify right side
    103,709.88x = 10,298,327,776.13
  5. Step 5: Solve for x
    x = 10,298,327,776.13/103,709.88
  6. Step 6: Final answer
    x = 99,299.39

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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.