Home / 138,554.53-191,207.38-81,180.12

Finding the Fourth Proportional to 138,554.53, 191,207.38 and 81,180.12

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Solution

The fourth proportional to 138,554.53, 191,207.38 and 81,180.12 is: 112,029.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,554.53 : 191,207.38 = 81,180.12 : x
  2. Step 2: Convert to fraction form
    138,554.53/191,207.38 = 81,180.12/x
  3. Step 3: Cross multiply
    138,554.53x = 191,207.38 × 81,180.12
  4. Step 4: Simplify right side
    138,554.53x = 15,522,237,647.39
  5. Step 5: Solve for x
    x = 15,522,237,647.39/138,554.53
  6. Step 6: Final answer
    x = 112,029.81

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1.5x scale

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.