Home / 138,378.27-190,889.27-87,372.57

Finding the Fourth Proportional to 138,378.27, 190,889.27 and 87,372.57

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Solution

The fourth proportional to 138,378.27, 190,889.27 and 87,372.57 is: 120,528.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,378.27 : 190,889.27 = 87,372.57 : x
  2. Step 2: Convert to fraction form
    138,378.27/190,889.27 = 87,372.57/x
  3. Step 3: Cross multiply
    138,378.27x = 190,889.27 × 87,372.57
  4. Step 4: Simplify right side
    138,378.27x = 16,678,487,203.41
  5. Step 5: Solve for x
    x = 16,678,487,203.41/138,378.27
  6. Step 6: Final answer
    x = 120,528.22

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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.