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Finding the Fourth Proportional to 68,904,391.01, 103,371,720.41 and 20,378,461.59

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Solution

The fourth proportional to 68,904,391.01, 103,371,720.41 and 20,378,461.59 is: 30,572,168.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,904,391.01 : 103,371,720.41 = 20,378,461.59 : x
  2. Step 2: Convert to fraction form
    68,904,391.01/103,371,720.41 = 20,378,461.59/x
  3. Step 3: Cross multiply
    68,904,391.01x = 103,371,720.41 × 20,378,461.59
  4. Step 4: Simplify right side
    68,904,391.01x = 2,106,556,633,918,350
  5. Step 5: Solve for x
    x = 2,106,556,633,918,350/68,904,391.01
  6. Step 6: Final answer
    x = 30,572,168.23

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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.