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Finding the Fourth Proportional to 66,882,661.20, 100,323,991.80 and 38,184,847.20

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Solution

The fourth proportional to 66,882,661.20, 100,323,991.80 and 38,184,847.20 is: 57,277,270.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,882,661.20 : 100,323,991.80 = 38,184,847.20 : x
  2. Step 2: Convert to fraction form
    66,882,661.20/100,323,991.80 = 38,184,847.20/x
  3. Step 3: Cross multiply
    66,882,661.20x = 100,323,991.80 × 38,184,847.20
  4. Step 4: Simplify right side
    66,882,661.20x = 3,830,856,297,377,053
  5. Step 5: Solve for x
    x = 3,830,856,297,377,053/66,882,661.20
  6. Step 6: Final answer
    x = 57,277,270.80

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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.