Home / 78,351,247.20-117,526,870.80-65,810,114.40

Finding the Fourth Proportional to 78,351,247.20, 117,526,870.80 and 65,810,114.40

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Solution

The fourth proportional to 78,351,247.20, 117,526,870.80 and 65,810,114.40 is: 98,715,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351,247.20 : 117,526,870.80 = 65,810,114.40 : x
  2. Step 2: Convert to fraction form
    78,351,247.20/117,526,870.80 = 65,810,114.40/x
  3. Step 3: Cross multiply
    78,351,247.20x = 117,526,870.80 × 65,810,114.40
  4. Step 4: Simplify right side
    78,351,247.20x = 7,734,456,812,422,019
  5. Step 5: Solve for x
    x = 7,734,456,812,422,019/78,351,247.20
  6. Step 6: Final answer
    x = 98,715,171.60

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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.