Home / 139,989,940.70-209,984,911.05-91,616,999.90

Finding the Fourth Proportional to 139,989,940.70, 209,984,911.05 and 91,616,999.90

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Solution

The fourth proportional to 139,989,940.70, 209,984,911.05 and 91,616,999.90 is: 137,425,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,989,940.70 : 209,984,911.05 = 91,616,999.90 : x
  2. Step 2: Convert to fraction form
    139,989,940.70/209,984,911.05 = 91,616,999.90/x
  3. Step 3: Cross multiply
    139,989,940.70x = 209,984,911.05 × 91,616,999.90
  4. Step 4: Simplify right side
    139,989,940.70x = 19,238,187,574,669,360
  5. Step 5: Solve for x
    x = 19,238,187,574,669,360/139,989,940.70
  6. Step 6: Final answer
    x = 137,425,499.85

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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.