Home / 103,640.60-155,460.90-71,983.78

Finding the Fourth Proportional to 103,640.60, 155,460.90 and 71,983.78

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Solution

The fourth proportional to 103,640.60, 155,460.90 and 71,983.78 is: 107,975.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.60 : 155,460.90 = 71,983.78 : x
  2. Step 2: Convert to fraction form
    103,640.60/155,460.90 = 71,983.78/x
  3. Step 3: Cross multiply
    103,640.60x = 155,460.90 × 71,983.78
  4. Step 4: Simplify right side
    103,640.60x = 11,190,663,224.20
  5. Step 5: Solve for x
    x = 11,190,663,224.20/103,640.60
  6. Step 6: Final answer
    x = 107,975.67

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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.