Home / 99,730.40-149,336.40-78,821.60

Finding the Fourth Proportional to 99,730.40, 149,336.40 and 78,821.60

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Solution

The fourth proportional to 99,730.40, 149,336.40 and 78,821.60 is: 118,027.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,730.40 : 149,336.40 = 78,821.60 : x
  2. Step 2: Convert to fraction form
    99,730.40/149,336.40 = 78,821.60/x
  3. Step 3: Cross multiply
    99,730.40x = 149,336.40 × 78,821.60
  4. Step 4: Simplify right side
    99,730.40x = 11,770,933,986.24
  5. Step 5: Solve for x
    x = 11,770,933,986.24/99,730.40
  6. Step 6: Final answer
    x = 118,027.54

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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.