Home / 138,046.58-190,504.59-77,617.74

Finding the Fourth Proportional to 138,046.58, 190,504.59 and 77,617.74

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Solution

The fourth proportional to 138,046.58, 190,504.59 and 77,617.74 is: 107,112.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,046.58 : 190,504.59 = 77,617.74 : x
  2. Step 2: Convert to fraction form
    138,046.58/190,504.59 = 77,617.74/x
  3. Step 3: Cross multiply
    138,046.58x = 190,504.59 × 77,617.74
  4. Step 4: Simplify right side
    138,046.58x = 14,786,535,735.43
  5. Step 5: Solve for x
    x = 14,786,535,735.43/138,046.58
  6. Step 6: Final answer
    x = 107,112.66

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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.