Home / 77,087.34-115,638.71-20,928.35

Finding the Fourth Proportional to 77,087.34, 115,638.71 and 20,928.35

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Solution

The fourth proportional to 77,087.34, 115,638.71 and 20,928.35 is: 31,394.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,087.34 : 115,638.71 = 20,928.35 : x
  2. Step 2: Convert to fraction form
    77,087.34/115,638.71 = 20,928.35/x
  3. Step 3: Cross multiply
    77,087.34x = 115,638.71 × 20,928.35
  4. Step 4: Simplify right side
    77,087.34x = 2,420,126,713.59
  5. Step 5: Solve for x
    x = 2,420,126,713.59/77,087.34
  6. Step 6: Final answer
    x = 31,394.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.