Home / 78,600.20-108,464.86-42,790.33

Finding the Fourth Proportional to 78,600.20, 108,464.86 and 42,790.33

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Solution

The fourth proportional to 78,600.20, 108,464.86 and 42,790.33 is: 59,048.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.20 : 108,464.86 = 42,790.33 : x
  2. Step 2: Convert to fraction form
    78,600.20/108,464.86 = 42,790.33/x
  3. Step 3: Cross multiply
    78,600.20x = 108,464.86 × 42,790.33
  4. Step 4: Simplify right side
    78,600.20x = 4,641,246,774.67
  5. Step 5: Solve for x
    x = 4,641,246,774.67/78,600.20
  6. Step 6: Final answer
    x = 59,048.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.