Home / 81,678,667.20-122,368,701.60-66,450,148.80

Finding the Fourth Proportional to 81,678,667.20, 122,368,701.60 and 66,450,148.80

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Solution

The fourth proportional to 81,678,667.20, 122,368,701.60 and 66,450,148.80 is: 99,553,759.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678,667.20 : 122,368,701.60 = 66,450,148.80 : x
  2. Step 2: Convert to fraction form
    81,678,667.20/122,368,701.60 = 66,450,148.80/x
  3. Step 3: Cross multiply
    81,678,667.20x = 122,368,701.60 × 66,450,148.80
  4. Step 4: Simplify right side
    81,678,667.20x = 8,131,418,429,782,797
  5. Step 5: Solve for x
    x = 8,131,418,429,782,797/81,678,667.20
  6. Step 6: Final answer
    x = 99,553,759.98

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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.