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Finding the Fourth Proportional to 69,761,477.70, 104,642,216.55 and 21,238,946.10

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Solution

The fourth proportional to 69,761,477.70, 104,642,216.55 and 21,238,946.10 is: 31,858,419.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,761,477.70 : 104,642,216.55 = 21,238,946.10 : x
  2. Step 2: Convert to fraction form
    69,761,477.70/104,642,216.55 = 21,238,946.10/x
  3. Step 3: Cross multiply
    69,761,477.70x = 104,642,216.55 × 21,238,946.10
  4. Step 4: Simplify right side
    69,761,477.70x = 2,222,490,397,089,978
  5. Step 5: Solve for x
    x = 2,222,490,397,089,978/69,761,477.70
  6. Step 6: Final answer
    x = 31,858,419.15

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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.