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Finding the Fourth Proportional to 80,545,868.80, 120,897,446.40 and 40,201,907.20

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Solution

The fourth proportional to 80,545,868.80, 120,897,446.40 and 40,201,907.20 is: 60,342,113.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,545,868.80 : 120,897,446.40 = 40,201,907.20 : x
  2. Step 2: Convert to fraction form
    80,545,868.80/120,897,446.40 = 40,201,907.20/x
  3. Step 3: Cross multiply
    80,545,868.80x = 120,897,446.40 × 40,201,907.20
  4. Step 4: Simplify right side
    80,545,868.80x = 4,860,307,920,889,775
  5. Step 5: Solve for x
    x = 4,860,307,920,889,775/80,545,868.80
  6. Step 6: Final answer
    x = 60,342,113.05

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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.