Home / 138,379.27-190,890.65-87,373.57

Finding the Fourth Proportional to 138,379.27, 190,890.65 and 87,373.57

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Solution

The fourth proportional to 138,379.27, 190,890.65 and 87,373.57 is: 120,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,379.27 : 190,890.65 = 87,373.57 : x
  2. Step 2: Convert to fraction form
    138,379.27/190,890.65 = 87,373.57/x
  3. Step 3: Cross multiply
    138,379.27x = 190,890.65 × 87,373.57
  4. Step 4: Simplify right side
    138,379.27x = 16,678,797,570.12
  5. Step 5: Solve for x
    x = 16,678,797,570.12/138,379.27
  6. Step 6: Final answer
    x = 120,529.60

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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.