Home / 78,021.45-107,669.61-42,211.44

Finding the Fourth Proportional to 78,021.45, 107,669.61 and 42,211.44

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Solution

The fourth proportional to 78,021.45, 107,669.61 and 42,211.44 is: 58,251.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,021.45 : 107,669.61 = 42,211.44 : x
  2. Step 2: Convert to fraction form
    78,021.45/107,669.61 = 42,211.44/x
  3. Step 3: Cross multiply
    78,021.45x = 107,669.61 × 42,211.44
  4. Step 4: Simplify right side
    78,021.45x = 4,544,889,282.34
  5. Step 5: Solve for x
    x = 4,544,889,282.34/78,021.45
  6. Step 6: Final answer
    x = 58,251.79

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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.