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Finding the Fourth Proportional to 66,948,051.20, 100,422,076.80 and 18,425,811.20

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Solution

The fourth proportional to 66,948,051.20, 100,422,076.80 and 18,425,811.20 is: 27,638,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,948,051.20 : 100,422,076.80 = 18,425,811.20 : x
  2. Step 2: Convert to fraction form
    66,948,051.20/100,422,076.80 = 18,425,811.20/x
  3. Step 3: Cross multiply
    66,948,051.20x = 100,422,076.80 × 18,425,811.20
  4. Step 4: Simplify right side
    66,948,051.20x = 1,850,358,227,428,700
  5. Step 5: Solve for x
    x = 1,850,358,227,428,700/66,948,051.20
  6. Step 6: Final answer
    x = 27,638,716.80

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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.