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Finding the Fourth Proportional to 279,430.86, 419,111.64 and 79,768.74

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Solution

The fourth proportional to 279,430.86, 419,111.64 and 79,768.74 is: 119,643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,430.86 : 419,111.64 = 79,768.74 : x
  2. Step 2: Convert to fraction form
    279,430.86/419,111.64 = 79,768.74/x
  3. Step 3: Cross multiply
    279,430.86x = 419,111.64 × 79,768.74
  4. Step 4: Simplify right side
    279,430.86x = 33,432,007,442.13
  5. Step 5: Solve for x
    x = 33,432,007,442.13/279,430.86
  6. Step 6: Final answer
    x = 119,643.22

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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.