Home / 139,969,969.20-209,954,953.80-82,432,623.60

Finding the Fourth Proportional to 139,969,969.20, 209,954,953.80 and 82,432,623.60

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Solution

The fourth proportional to 139,969,969.20, 209,954,953.80 and 82,432,623.60 is: 123,648,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,969.20 : 209,954,953.80 = 82,432,623.60 : x
  2. Step 2: Convert to fraction form
    139,969,969.20/209,954,953.80 = 82,432,623.60/x
  3. Step 3: Cross multiply
    139,969,969.20x = 209,954,953.80 × 82,432,623.60
  4. Step 4: Simplify right side
    139,969,969.20x = 17,307,137,679,550,790
  5. Step 5: Solve for x
    x = 17,307,137,679,550,790/139,969,969.20
  6. Step 6: Final answer
    x = 123,648,935.40

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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.