Home / 139,968,142.70-209,952,214.05-128,914,169.90

Finding the Fourth Proportional to 139,968,142.70, 209,952,214.05 and 128,914,169.90

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Solution

The fourth proportional to 139,968,142.70, 209,952,214.05 and 128,914,169.90 is: 193,371,254.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,142.70 : 209,952,214.05 = 128,914,169.90 : x
  2. Step 2: Convert to fraction form
    139,968,142.70/209,952,214.05 = 128,914,169.90/x
  3. Step 3: Cross multiply
    139,968,142.70x = 209,952,214.05 × 128,914,169.90
  4. Step 4: Simplify right side
    139,968,142.70x = 27,065,815,392,922,868
  5. Step 5: Solve for x
    x = 27,065,815,392,922,868/139,968,142.70
  6. Step 6: Final answer
    x = 193,371,254.85

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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.