Home / 86,042.28-128,917.80-52,692.69

Finding the Fourth Proportional to 86,042.28, 128,917.80 and 52,692.69

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Solution

The fourth proportional to 86,042.28, 128,917.80 and 52,692.69 is: 78,949.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,042.28 : 128,917.80 = 52,692.69 : x
  2. Step 2: Convert to fraction form
    86,042.28/128,917.80 = 52,692.69/x
  3. Step 3: Cross multiply
    86,042.28x = 128,917.80 × 52,692.69
  4. Step 4: Simplify right side
    86,042.28x = 6,793,025,670.88
  5. Step 5: Solve for x
    x = 6,793,025,670.88/86,042.28
  6. Step 6: Final answer
    x = 78,949.86

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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.