Home / 78,287,404.80-117,431,107.20-49,188,057.60

Finding the Fourth Proportional to 78,287,404.80, 117,431,107.20 and 49,188,057.60

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Solution

The fourth proportional to 78,287,404.80, 117,431,107.20 and 49,188,057.60 is: 73,782,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,287,404.80 : 117,431,107.20 = 49,188,057.60 : x
  2. Step 2: Convert to fraction form
    78,287,404.80/117,431,107.20 = 49,188,057.60/x
  3. Step 3: Cross multiply
    78,287,404.80x = 117,431,107.20 × 49,188,057.60
  4. Step 4: Simplify right side
    78,287,404.80x = 5,776,208,064,985,375
  5. Step 5: Solve for x
    x = 5,776,208,064,985,375/78,287,404.80
  6. Step 6: Final answer
    x = 73,782,086.40

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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.