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Finding the Fourth Proportional to 66,388,937.40, 99,583,406.10 and 20,955,324.60

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Solution

The fourth proportional to 66,388,937.40, 99,583,406.10 and 20,955,324.60 is: 31,432,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,388,937.40 : 99,583,406.10 = 20,955,324.60 : x
  2. Step 2: Convert to fraction form
    66,388,937.40/99,583,406.10 = 20,955,324.60/x
  3. Step 3: Cross multiply
    66,388,937.40x = 99,583,406.10 × 20,955,324.60
  4. Step 4: Simplify right side
    66,388,937.40x = 2,086,802,599,599,120
  5. Step 5: Solve for x
    x = 2,086,802,599,599,120/66,388,937.40
  6. Step 6: Final answer
    x = 31,432,986.90

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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.