Home / 145,405.44-200,640-81,730.56

Finding the Fourth Proportional to 145,405.44, 200,640 and 81,730.56

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Solution

The fourth proportional to 145,405.44, 200,640 and 81,730.56 is: 112,777.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,405.44 : 200,640 = 81,730.56 : x
  2. Step 2: Convert to fraction form
    145,405.44/200,640 = 81,730.56/x
  3. Step 3: Cross multiply
    145,405.44x = 200,640 × 81,730.56
  4. Step 4: Simplify right side
    145,405.44x = 16,398,419,558.40
  5. Step 5: Solve for x
    x = 16,398,419,558.40/145,405.44
  6. Step 6: Final answer
    x = 112,777.21

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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.