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Finding the Fourth Proportional to 279,909,972.08, 419,863,463.04 and 72,648,231.38

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Solution

The fourth proportional to 279,909,972.08, 419,863,463.04 and 72,648,231.38 is: 108,971,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,909,972.08 : 419,863,463.04 = 72,648,231.38 : x
  2. Step 2: Convert to fraction form
    279,909,972.08/419,863,463.04 = 72,648,231.38/x
  3. Step 3: Cross multiply
    279,909,972.08x = 419,863,463.04 × 72,648,231.38
  4. Step 4: Simplify right side
    279,909,972.08x = 30,502,338,010,937,996
  5. Step 5: Solve for x
    x = 30,502,338,010,937,996/279,909,972.08
  6. Step 6: Final answer
    x = 108,971,959.03

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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.