Home / 138,944.16-208,435.68-45,431.28

Finding the Fourth Proportional to 138,944.16, 208,435.68 and 45,431.28

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Solution

The fourth proportional to 138,944.16, 208,435.68 and 45,431.28 is: 68,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,944.16 : 208,435.68 = 45,431.28 : x
  2. Step 2: Convert to fraction form
    138,944.16/208,435.68 = 45,431.28/x
  3. Step 3: Cross multiply
    138,944.16x = 208,435.68 × 45,431.28
  4. Step 4: Simplify right side
    138,944.16x = 9,469,499,740.07
  5. Step 5: Solve for x
    x = 9,469,499,740.07/138,944.16
  6. Step 6: Final answer
    x = 68,153.28

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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.