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Finding the Fourth Proportional to 66,059,978.70, 99,089,968.05 and 56,494,040.70

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Solution

The fourth proportional to 66,059,978.70, 99,089,968.05 and 56,494,040.70 is: 84,741,061.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,059,978.70 : 99,089,968.05 = 56,494,040.70 : x
  2. Step 2: Convert to fraction form
    66,059,978.70/99,089,968.05 = 56,494,040.70/x
  3. Step 3: Cross multiply
    66,059,978.70x = 99,089,968.05 × 56,494,040.70
  4. Step 4: Simplify right side
    66,059,978.70x = 5,597,992,687,978,400
  5. Step 5: Solve for x
    x = 5,597,992,687,978,400/66,059,978.70
  6. Step 6: Final answer
    x = 84,741,061.05

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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.