Home / 99,640,016.80-149,460,025.20-72,430,237.60

Finding the Fourth Proportional to 99,640,016.80, 149,460,025.20 and 72,430,237.60

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Solution

The fourth proportional to 99,640,016.80, 149,460,025.20 and 72,430,237.60 is: 108,645,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640,016.80 : 149,460,025.20 = 72,430,237.60 : x
  2. Step 2: Convert to fraction form
    99,640,016.80/149,460,025.20 = 72,430,237.60/x
  3. Step 3: Cross multiply
    99,640,016.80x = 149,460,025.20 × 72,430,237.60
  4. Step 4: Simplify right side
    99,640,016.80x = 10,825,425,136,937,986
  5. Step 5: Solve for x
    x = 10,825,425,136,937,986/99,640,016.80
  6. Step 6: Final answer
    x = 108,645,356.40

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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.