Home / 138,887.12-208,325.56-40,388.56

Finding the Fourth Proportional to 138,887.12, 208,325.56 and 40,388.56

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Solution

The fourth proportional to 138,887.12, 208,325.56 and 40,388.56 is: 60,581.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.12 : 208,325.56 = 40,388.56 : x
  2. Step 2: Convert to fraction form
    138,887.12/208,325.56 = 40,388.56/x
  3. Step 3: Cross multiply
    138,887.12x = 208,325.56 × 40,388.56
  4. Step 4: Simplify right side
    138,887.12x = 8,413,969,379.59
  5. Step 5: Solve for x
    x = 8,413,969,379.59/138,887.12
  6. Step 6: Final answer
    x = 60,581.35

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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.