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Finding the Fourth Proportional to 139,968,161.70, 209,952,242.55 and 125,859,387.30

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Solution

The fourth proportional to 139,968,161.70, 209,952,242.55 and 125,859,387.30 is: 188,789,080.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,161.70 : 209,952,242.55 = 125,859,387.30 : x
  2. Step 2: Convert to fraction form
    139,968,161.70/209,952,242.55 = 125,859,387.30/x
  3. Step 3: Cross multiply
    139,968,161.70x = 209,952,242.55 × 125,859,387.30
  4. Step 4: Simplify right side
    139,968,161.70x = 26,424,460,609,603,992
  5. Step 5: Solve for x
    x = 26,424,460,609,603,992/139,968,161.70
  6. Step 6: Final answer
    x = 188,789,080.95

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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.