Home / 78,624,136.80-117,936,205.20-40,360,384.80

Finding the Fourth Proportional to 78,624,136.80, 117,936,205.20 and 40,360,384.80

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Solution

The fourth proportional to 78,624,136.80, 117,936,205.20 and 40,360,384.80 is: 60,540,577.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,624,136.80 : 117,936,205.20 = 40,360,384.80 : x
  2. Step 2: Convert to fraction form
    78,624,136.80/117,936,205.20 = 40,360,384.80/x
  3. Step 3: Cross multiply
    78,624,136.80x = 117,936,205.20 × 40,360,384.80
  4. Step 4: Simplify right side
    78,624,136.80x = 4,759,950,623,723,761
  5. Step 5: Solve for x
    x = 4,759,950,623,723,761/78,624,136.80
  6. Step 6: Final answer
    x = 60,540,577.20

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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.