Home / 138,517.41-191,135.61-78,090.60

Finding the Fourth Proportional to 138,517.41, 191,135.61 and 78,090.60

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Solution

The fourth proportional to 138,517.41, 191,135.61 and 78,090.60 is: 107,754.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,517.41 : 191,135.61 = 78,090.60 : x
  2. Step 2: Convert to fraction form
    138,517.41/191,135.61 = 78,090.60/x
  3. Step 3: Cross multiply
    138,517.41x = 191,135.61 × 78,090.60
  4. Step 4: Simplify right side
    138,517.41x = 14,925,894,466.27
  5. Step 5: Solve for x
    x = 14,925,894,466.27/138,517.41
  6. Step 6: Final answer
    x = 107,754.65

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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.