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Finding the Fourth Proportional to 279,936,362.40, 419,904,543.60 and 98,201,911.20

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Solution

The fourth proportional to 279,936,362.40, 419,904,543.60 and 98,201,911.20 is: 147,302,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,362.40 : 419,904,543.60 = 98,201,911.20 : x
  2. Step 2: Convert to fraction form
    279,936,362.40/419,904,543.60 = 98,201,911.20/x
  3. Step 3: Cross multiply
    279,936,362.40x = 419,904,543.60 × 98,201,911.20
  4. Step 4: Simplify right side
    279,936,362.40x = 41,235,428,703,083,728
  5. Step 5: Solve for x
    x = 41,235,428,703,083,728/279,936,362.40
  6. Step 6: Final answer
    x = 147,302,866.80

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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.