Home / 138,887.36-208,356.96-45,458.72

Finding the Fourth Proportional to 138,887.36, 208,356.96 and 45,458.72

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Solution

The fourth proportional to 138,887.36, 208,356.96 and 45,458.72 is: 68,196.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.36 : 208,356.96 = 45,458.72 : x
  2. Step 2: Convert to fraction form
    138,887.36/208,356.96 = 45,458.72/x
  3. Step 3: Cross multiply
    138,887.36x = 208,356.96 × 45,458.72
  4. Step 4: Simplify right side
    138,887.36x = 9,471,640,704.69
  5. Step 5: Solve for x
    x = 9,471,640,704.69/138,887.36
  6. Step 6: Final answer
    x = 68,196.56

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1.5x scale

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.