Home / 135,108.72-186,326.06-81,300.33

Finding the Fourth Proportional to 135,108.72, 186,326.06 and 81,300.33

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Solution

The fourth proportional to 135,108.72, 186,326.06 and 81,300.33 is: 112,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,108.72 : 186,326.06 = 81,300.33 : x
  2. Step 2: Convert to fraction form
    135,108.72/186,326.06 = 81,300.33/x
  3. Step 3: Cross multiply
    135,108.72x = 186,326.06 × 81,300.33
  4. Step 4: Simplify right side
    135,108.72x = 15,148,369,759.10
  5. Step 5: Solve for x
    x = 15,148,369,759.10/135,108.72
  6. Step 6: Final answer
    x = 112,119.85

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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.