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Finding the Fourth Proportional to 139,968,018.20, 209,952,027.30 and 71,093,264.60

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Solution

The fourth proportional to 139,968,018.20, 209,952,027.30 and 71,093,264.60 is: 106,639,896.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,018.20 : 209,952,027.30 = 71,093,264.60 : x
  2. Step 2: Convert to fraction form
    139,968,018.20/209,952,027.30 = 71,093,264.60/x
  3. Step 3: Cross multiply
    139,968,018.20x = 209,952,027.30 × 71,093,264.60
  4. Step 4: Simplify right side
    139,968,018.20x = 14,926,175,030,145,324
  5. Step 5: Solve for x
    x = 14,926,175,030,145,324/139,968,018.20
  6. Step 6: Final answer
    x = 106,639,896.90

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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.