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Finding the Fourth Proportional to 68,649,920.40, 102,974,880.60 and 36,289,318.80

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Solution

The fourth proportional to 68,649,920.40, 102,974,880.60 and 36,289,318.80 is: 54,433,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,649,920.40 : 102,974,880.60 = 36,289,318.80 : x
  2. Step 2: Convert to fraction form
    68,649,920.40/102,974,880.60 = 36,289,318.80/x
  3. Step 3: Cross multiply
    68,649,920.40x = 102,974,880.60 × 36,289,318.80
  4. Step 4: Simplify right side
    68,649,920.40x = 3,736,888,270,485,335
  5. Step 5: Solve for x
    x = 3,736,888,270,485,335/68,649,920.40
  6. Step 6: Final answer
    x = 54,433,978.20

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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.