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Finding the Fourth Proportional to 30,542,978.42, 45,847,664.67 and 12,359,692.34

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Solution

The fourth proportional to 30,542,978.42, 45,847,664.67 and 12,359,692.34 is: 18,552,972.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,542,978.42 : 45,847,664.67 = 12,359,692.34 : x
  2. Step 2: Convert to fraction form
    30,542,978.42/45,847,664.67 = 12,359,692.34/x
  3. Step 3: Cross multiply
    30,542,978.42x = 45,847,664.67 × 12,359,692.34
  4. Step 4: Simplify right side
    30,542,978.42x = 566,663,029,828,687.62
  5. Step 5: Solve for x
    x = 566,663,029,828,687.62/30,542,978.42
  6. Step 6: Final answer
    x = 18,552,972.21

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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.