Home / 205,236.47-307,865.07-78,832.40

Finding the Fourth Proportional to 205,236.47, 307,865.07 and 78,832.40

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Solution

The fourth proportional to 205,236.47, 307,865.07 and 78,832.40 is: 118,252.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,236.47 : 307,865.07 = 78,832.40 : x
  2. Step 2: Convert to fraction form
    205,236.47/307,865.07 = 78,832.40/x
  3. Step 3: Cross multiply
    205,236.47x = 307,865.07 × 78,832.40
  4. Step 4: Simplify right side
    205,236.47x = 24,269,742,344.27
  5. Step 5: Solve for x
    x = 24,269,742,344.27/205,236.47
  6. Step 6: Final answer
    x = 118,252.58

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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.