Home / 138,936.53-191,736.02-85,190.60

Finding the Fourth Proportional to 138,936.53, 191,736.02 and 85,190.60

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Solution

The fourth proportional to 138,936.53, 191,736.02 and 85,190.60 is: 117,565.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,936.53 : 191,736.02 = 85,190.60 : x
  2. Step 2: Convert to fraction form
    138,936.53/191,736.02 = 85,190.60/x
  3. Step 3: Cross multiply
    138,936.53x = 191,736.02 × 85,190.60
  4. Step 4: Simplify right side
    138,936.53x = 16,334,106,585.41
  5. Step 5: Solve for x
    x = 16,334,106,585.41/138,936.53
  6. Step 6: Final answer
    x = 117,565.24

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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.