Home / 76,394.08-105,422.19-42,400.58

Finding the Fourth Proportional to 76,394.08, 105,422.19 and 42,400.58

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Solution

The fourth proportional to 76,394.08, 105,422.19 and 42,400.58 is: 58,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,394.08 : 105,422.19 = 42,400.58 : x
  2. Step 2: Convert to fraction form
    76,394.08/105,422.19 = 42,400.58/x
  3. Step 3: Cross multiply
    76,394.08x = 105,422.19 × 42,400.58
  4. Step 4: Simplify right side
    76,394.08x = 4,469,962,000.87
  5. Step 5: Solve for x
    x = 4,469,962,000.87/76,394.08
  6. Step 6: Final answer
    x = 58,511.89

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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.