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Finding the Fourth Proportional to 80,546,000.80, 120,897,644.40 and 40,202,039.20

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Solution

The fourth proportional to 80,546,000.80, 120,897,644.40 and 40,202,039.20 is: 60,342,311.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,546,000.80 : 120,897,644.40 = 40,202,039.20 : x
  2. Step 2: Convert to fraction form
    80,546,000.80/120,897,644.40 = 40,202,039.20/x
  3. Step 3: Cross multiply
    80,546,000.80x = 120,897,644.40 × 40,202,039.20
  4. Step 4: Simplify right side
    80,546,000.80x = 4,860,331,839,356,461
  5. Step 5: Solve for x
    x = 4,860,331,839,356,461/80,546,000.80
  6. Step 6: Final answer
    x = 60,342,311.12

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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.