Home / 99,106,763.20-148,660,144.80-78,699,428.80

Finding the Fourth Proportional to 99,106,763.20, 148,660,144.80 and 78,699,428.80

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Solution

The fourth proportional to 99,106,763.20, 148,660,144.80 and 78,699,428.80 is: 118,049,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,106,763.20 : 148,660,144.80 = 78,699,428.80 : x
  2. Step 2: Convert to fraction form
    99,106,763.20/148,660,144.80 = 78,699,428.80/x
  3. Step 3: Cross multiply
    99,106,763.20x = 148,660,144.80 × 78,699,428.80
  4. Step 4: Simplify right side
    99,106,763.20x = 11,699,468,481,085,290
  5. Step 5: Solve for x
    x = 11,699,468,481,085,290/99,106,763.20
  6. Step 6: Final answer
    x = 118,049,143.20

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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.