Home / 99,640,039.80-149,460,059.70-72,430,260.60

Finding the Fourth Proportional to 99,640,039.80, 149,460,059.70 and 72,430,260.60

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Solution

The fourth proportional to 99,640,039.80, 149,460,059.70 and 72,430,260.60 is: 108,645,390.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640,039.80 : 149,460,059.70 = 72,430,260.60 : x
  2. Step 2: Convert to fraction form
    99,640,039.80/149,460,059.70 = 72,430,260.60/x
  3. Step 3: Cross multiply
    99,640,039.80x = 149,460,059.70 × 72,430,260.60
  4. Step 4: Simplify right side
    99,640,039.80x = 10,825,431,073,362,556
  5. Step 5: Solve for x
    x = 10,825,431,073,362,556/99,640,039.80
  6. Step 6: Final answer
    x = 108,645,390.90

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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.