Home / 109,209,619.20-163,814,428.80-91,990,930.80

Finding the Fourth Proportional to 109,209,619.20, 163,814,428.80 and 91,990,930.80

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Solution

The fourth proportional to 109,209,619.20, 163,814,428.80 and 91,990,930.80 is: 137,986,396.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,209,619.20 : 163,814,428.80 = 91,990,930.80 : x
  2. Step 2: Convert to fraction form
    109,209,619.20/163,814,428.80 = 91,990,930.80/x
  3. Step 3: Cross multiply
    109,209,619.20x = 163,814,428.80 × 91,990,930.80
  4. Step 4: Simplify right side
    109,209,619.20x = 15,069,441,783,782,328
  5. Step 5: Solve for x
    x = 15,069,441,783,782,328/109,209,619.20
  6. Step 6: Final answer
    x = 137,986,396.20

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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.