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Finding the Fourth Proportional to 72,909,274.80, 109,363,912.20 and 29,764,138.80

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Solution

The fourth proportional to 72,909,274.80, 109,363,912.20 and 29,764,138.80 is: 44,646,208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,909,274.80 : 109,363,912.20 = 29,764,138.80 : x
  2. Step 2: Convert to fraction form
    72,909,274.80/109,363,912.20 = 29,764,138.80/x
  3. Step 3: Cross multiply
    72,909,274.80x = 109,363,912.20 × 29,764,138.80
  4. Step 4: Simplify right side
    72,909,274.80x = 3,255,122,662,431,813.50
  5. Step 5: Solve for x
    x = 3,255,122,662,431,813.50/72,909,274.80
  6. Step 6: Final answer
    x = 44,646,208.20

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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.