Home / 78,346.47-117,439.26-30,942.35

Finding the Fourth Proportional to 78,346.47, 117,439.26 and 30,942.35

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Solution

The fourth proportional to 78,346.47, 117,439.26 and 30,942.35 is: 46,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.47 : 117,439.26 = 30,942.35 : x
  2. Step 2: Convert to fraction form
    78,346.47/117,439.26 = 30,942.35/x
  3. Step 3: Cross multiply
    78,346.47x = 117,439.26 × 30,942.35
  4. Step 4: Simplify right side
    78,346.47x = 3,633,846,099.46
  5. Step 5: Solve for x
    x = 3,633,846,099.46/78,346.47
  6. Step 6: Final answer
    x = 46,381.75

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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.