Home / 138,741.89-191,464.31-75,079.67

Finding the Fourth Proportional to 138,741.89, 191,464.31 and 75,079.67

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Solution

The fourth proportional to 138,741.89, 191,464.31 and 75,079.67 is: 103,610.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,741.89 : 191,464.31 = 75,079.67 : x
  2. Step 2: Convert to fraction form
    138,741.89/191,464.31 = 75,079.67/x
  3. Step 3: Cross multiply
    138,741.89x = 191,464.31 × 75,079.67
  4. Step 4: Simplify right side
    138,741.89x = 14,375,076,836.18
  5. Step 5: Solve for x
    x = 14,375,076,836.18/138,741.89
  6. Step 6: Final answer
    x = 103,610.21

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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.