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Finding the Fourth Proportional to 74,756,936.20, 112,135,404.30 and 20,169,416.20

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Solution

The fourth proportional to 74,756,936.20, 112,135,404.30 and 20,169,416.20 is: 30,254,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,756,936.20 : 112,135,404.30 = 20,169,416.20 : x
  2. Step 2: Convert to fraction form
    74,756,936.20/112,135,404.30 = 20,169,416.20/x
  3. Step 3: Cross multiply
    74,756,936.20x = 112,135,404.30 × 20,169,416.20
  4. Step 4: Simplify right side
    74,756,936.20x = 2,261,705,640,081,969.50
  5. Step 5: Solve for x
    x = 2,261,705,640,081,969.50/74,756,936.20
  6. Step 6: Final answer
    x = 30,254,124.30

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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.