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Finding the Fourth Proportional to 206,649,661.20, 309,974,491.80 and 70,339,491.60

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Solution

The fourth proportional to 206,649,661.20, 309,974,491.80 and 70,339,491.60 is: 105,509,237.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,649,661.20 : 309,974,491.80 = 70,339,491.60 : x
  2. Step 2: Convert to fraction form
    206,649,661.20/309,974,491.80 = 70,339,491.60/x
  3. Step 3: Cross multiply
    206,649,661.20x = 309,974,491.80 × 70,339,491.60
  4. Step 4: Simplify right side
    206,649,661.20x = 21,803,448,162,180,368
  5. Step 5: Solve for x
    x = 21,803,448,162,180,368/206,649,661.20
  6. Step 6: Final answer
    x = 105,509,237.40

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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.