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Finding the Fourth Proportional to 279,406.86, 419,172.79 and 101,913.87

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Solution

The fourth proportional to 279,406.86, 419,172.79 and 101,913.87 is: 152,893.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,406.86 : 419,172.79 = 101,913.87 : x
  2. Step 2: Convert to fraction form
    279,406.86/419,172.79 = 101,913.87/x
  3. Step 3: Cross multiply
    279,406.86x = 419,172.79 × 101,913.87
  4. Step 4: Simplify right side
    279,406.86x = 42,719,521,227.60
  5. Step 5: Solve for x
    x = 42,719,521,227.60/279,406.86
  6. Step 6: Final answer
    x = 152,893.60

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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.