Home / 138,285.72-190,837.62-77,858.37

Finding the Fourth Proportional to 138,285.72, 190,837.62 and 77,858.37

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Solution

The fourth proportional to 138,285.72, 190,837.62 and 77,858.37 is: 107,446.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,285.72 : 190,837.62 = 77,858.37 : x
  2. Step 2: Convert to fraction form
    138,285.72/190,837.62 = 77,858.37/x
  3. Step 3: Cross multiply
    138,285.72x = 190,837.62 × 77,858.37
  4. Step 4: Simplify right side
    138,285.72x = 14,858,306,027.88
  5. Step 5: Solve for x
    x = 14,858,306,027.88/138,285.72
  6. Step 6: Final answer
    x = 107,446.42

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1.5x scale

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.