Home / 78,351,323.20-117,526,984.80-65,810,190.40

Finding the Fourth Proportional to 78,351,323.20, 117,526,984.80 and 65,810,190.40

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Solution

The fourth proportional to 78,351,323.20, 117,526,984.80 and 65,810,190.40 is: 98,715,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351,323.20 : 117,526,984.80 = 65,810,190.40 : x
  2. Step 2: Convert to fraction form
    78,351,323.20/117,526,984.80 = 65,810,190.40/x
  3. Step 3: Cross multiply
    78,351,323.20x = 117,526,984.80 × 65,810,190.40
  4. Step 4: Simplify right side
    78,351,323.20x = 7,734,473,246,825,906
  5. Step 5: Solve for x
    x = 7,734,473,246,825,906/78,351,323.20
  6. Step 6: Final answer
    x = 98,715,285.60

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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.