Home / 278,814.12-418,219.32-79,134.62

Finding the Fourth Proportional to 278,814.12, 418,219.32 and 79,134.62

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Solution

The fourth proportional to 278,814.12, 418,219.32 and 79,134.62 is: 118,701.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,814.12 : 418,219.32 = 79,134.62 : x
  2. Step 2: Convert to fraction form
    278,814.12/418,219.32 = 79,134.62/x
  3. Step 3: Cross multiply
    278,814.12x = 418,219.32 × 79,134.62
  4. Step 4: Simplify right side
    278,814.12x = 33,095,626,964.86
  5. Step 5: Solve for x
    x = 33,095,626,964.86/278,814.12
  6. Step 6: Final answer
    x = 118,701.40

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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.