Home / 138,060.39-190,519.53-77,629.48

Finding the Fourth Proportional to 138,060.39, 190,519.53 and 77,629.48

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Solution

The fourth proportional to 138,060.39, 190,519.53 and 77,629.48 is: 107,126.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,060.39 : 190,519.53 = 77,629.48 : x
  2. Step 2: Convert to fraction form
    138,060.39/190,519.53 = 77,629.48/x
  3. Step 3: Cross multiply
    138,060.39x = 190,519.53 × 77,629.48
  4. Step 4: Simplify right side
    138,060.39x = 14,789,932,281.89
  5. Step 5: Solve for x
    x = 14,789,932,281.89/138,060.39
  6. Step 6: Final answer
    x = 107,126.54

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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.