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Finding the Fourth Proportional to 40,603,809.80, 60,905,714.70 and 20,125,616.60

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Solution

The fourth proportional to 40,603,809.80, 60,905,714.70 and 20,125,616.60 is: 30,188,424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,603,809.80 : 60,905,714.70 = 20,125,616.60 : x
  2. Step 2: Convert to fraction form
    40,603,809.80/60,905,714.70 = 20,125,616.60/x
  3. Step 3: Cross multiply
    40,603,809.80x = 60,905,714.70 × 20,125,616.60
  4. Step 4: Simplify right side
    40,603,809.80x = 1,225,765,062,801,184.25
  5. Step 5: Solve for x
    x = 1,225,765,062,801,184.25/40,603,809.80
  6. Step 6: Final answer
    x = 30,188,424.90

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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.