Home / 138,036.33-190,489.01-87,081.98

Finding the Fourth Proportional to 138,036.33, 190,489.01 and 87,081.98

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Solution

The fourth proportional to 138,036.33, 190,489.01 and 87,081.98 is: 120,172.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,036.33 : 190,489.01 = 87,081.98 : x
  2. Step 2: Convert to fraction form
    138,036.33/190,489.01 = 87,081.98/x
  3. Step 3: Cross multiply
    138,036.33x = 190,489.01 × 87,081.98
  4. Step 4: Simplify right side
    138,036.33x = 16,588,158,771.18
  5. Step 5: Solve for x
    x = 16,588,158,771.18/138,036.33
  6. Step 6: Final answer
    x = 120,172.41

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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.