Home / 137,672.20-189,984.18-81,087.40

Finding the Fourth Proportional to 137,672.20, 189,984.18 and 81,087.40

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Solution

The fourth proportional to 137,672.20, 189,984.18 and 81,087.40 is: 111,898.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,672.20 : 189,984.18 = 81,087.40 : x
  2. Step 2: Convert to fraction form
    137,672.20/189,984.18 = 81,087.40/x
  3. Step 3: Cross multiply
    137,672.20x = 189,984.18 × 81,087.40
  4. Step 4: Simplify right side
    137,672.20x = 15,405,323,197.33
  5. Step 5: Solve for x
    x = 15,405,323,197.33/137,672.20
  6. Step 6: Final answer
    x = 111,898.58

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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.