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Finding the Fourth Proportional to 139,968,160.80, 209,952,241.20 and 120,484,615.20

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Solution

The fourth proportional to 139,968,160.80, 209,952,241.20 and 120,484,615.20 is: 180,726,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,160.80 : 209,952,241.20 = 120,484,615.20 : x
  2. Step 2: Convert to fraction form
    139,968,160.80/209,952,241.20 = 120,484,615.20/x
  3. Step 3: Cross multiply
    139,968,160.80x = 209,952,241.20 × 120,484,615.20
  4. Step 4: Simplify right side
    139,968,160.80x = 25,296,014,991,359,584
  5. Step 5: Solve for x
    x = 25,296,014,991,359,584/139,968,160.80
  6. Step 6: Final answer
    x = 180,726,922.80

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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.