Home / 386,015.62-579,023.67-105,511.78

Finding the Fourth Proportional to 386,015.62, 579,023.67 and 105,511.78

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Solution

The fourth proportional to 386,015.62, 579,023.67 and 105,511.78 is: 158,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,015.62 : 579,023.67 = 105,511.78 : x
  2. Step 2: Convert to fraction form
    386,015.62/579,023.67 = 105,511.78/x
  3. Step 3: Cross multiply
    386,015.62x = 579,023.67 × 105,511.78
  4. Step 4: Simplify right side
    386,015.62x = 61,093,818,083.83
  5. Step 5: Solve for x
    x = 61,093,818,083.83/386,015.62
  6. Step 6: Final answer
    x = 158,267.74

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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.