Home / 134,872.96-186,087.36-87,128.32

Finding the Fourth Proportional to 134,872.96, 186,087.36 and 87,128.32

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Solution

The fourth proportional to 134,872.96, 186,087.36 and 87,128.32 is: 120,212.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,872.96 : 186,087.36 = 87,128.32 : x
  2. Step 2: Convert to fraction form
    134,872.96/186,087.36 = 87,128.32/x
  3. Step 3: Cross multiply
    134,872.96x = 186,087.36 × 87,128.32
  4. Step 4: Simplify right side
    134,872.96x = 16,213,479,050.04
  5. Step 5: Solve for x
    x = 16,213,479,050.04/134,872.96
  6. Step 6: Final answer
    x = 120,212.97

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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.