Home / 78,485.36-117,707.31-34,101.74

Finding the Fourth Proportional to 78,485.36, 117,707.31 and 34,101.74

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Solution

The fourth proportional to 78,485.36, 117,707.31 and 34,101.74 is: 51,143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485.36 : 117,707.31 = 34,101.74 : x
  2. Step 2: Convert to fraction form
    78,485.36/117,707.31 = 34,101.74/x
  3. Step 3: Cross multiply
    78,485.36x = 117,707.31 × 34,101.74
  4. Step 4: Simplify right side
    78,485.36x = 4,014,024,375.99
  5. Step 5: Solve for x
    x = 4,014,024,375.99/78,485.36
  6. Step 6: Final answer
    x = 51,143.61

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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.