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Finding the Fourth Proportional to 39,868,906.40, 59,803,359.60 and 39,490,992.80

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Solution

The fourth proportional to 39,868,906.40, 59,803,359.60 and 39,490,992.80 is: 59,236,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,868,906.40 : 59,803,359.60 = 39,490,992.80 : x
  2. Step 2: Convert to fraction form
    39,868,906.40/59,803,359.60 = 39,490,992.80/x
  3. Step 3: Cross multiply
    39,868,906.40x = 59,803,359.60 × 39,490,992.80
  4. Step 4: Simplify right side
    39,868,906.40x = 2,361,694,043,379,411
  5. Step 5: Solve for x
    x = 2,361,694,043,379,411/39,868,906.40
  6. Step 6: Final answer
    x = 59,236,489.20

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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.