Home / 78,624,467.80-117,936,701.70-72,577,850.20

Finding the Fourth Proportional to 78,624,467.80, 117,936,701.70 and 72,577,850.20

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Solution

The fourth proportional to 78,624,467.80, 117,936,701.70 and 72,577,850.20 is: 108,866,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,624,467.80 : 117,936,701.70 = 72,577,850.20 : x
  2. Step 2: Convert to fraction form
    78,624,467.80/117,936,701.70 = 72,577,850.20/x
  3. Step 3: Cross multiply
    78,624,467.80x = 117,936,701.70 × 72,577,850.20
  4. Step 4: Simplify right side
    78,624,467.80x = 8,559,592,269,064,686
  5. Step 5: Solve for x
    x = 8,559,592,269,064,686/78,624,467.80
  6. Step 6: Final answer
    x = 108,866,775.30

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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.