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Finding the Fourth Proportional to 66,628,648.96, 91,945,808.52 and 36,860,396.80

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Solution

The fourth proportional to 66,628,648.96, 91,945,808.52 and 36,860,396.80 is: 50,866,392.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,628,648.96 : 91,945,808.52 = 36,860,396.80 : x
  2. Step 2: Convert to fraction form
    66,628,648.96/91,945,808.52 = 36,860,396.80/x
  3. Step 3: Cross multiply
    66,628,648.96x = 91,945,808.52 × 36,860,396.80
  4. Step 4: Simplify right side
    66,628,648.96x = 3,389,158,986,144,020.50
  5. Step 5: Solve for x
    x = 3,389,158,986,144,020.50/66,628,648.96
  6. Step 6: Final answer
    x = 50,866,392.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.