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Finding the Fourth Proportional to 100,878,105, 139,211,940.42 and 57,418,041

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Solution

The fourth proportional to 100,878,105, 139,211,940.42 and 57,418,041 is: 79,236,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,878,105 : 139,211,940.42 = 57,418,041 : x
  2. Step 2: Convert to fraction form
    100,878,105/139,211,940.42 = 57,418,041/x
  3. Step 3: Cross multiply
    100,878,105x = 139,211,940.42 × 57,418,041
  4. Step 4: Simplify right side
    100,878,105x = 7,993,276,902,725,116
  5. Step 5: Solve for x
    x = 7,993,276,902,725,116/100,878,105
  6. Step 6: Final answer
    x = 79,236,985.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.