Home / 86,983.20-120,016.80-51,159.60

Finding the Fourth Proportional to 86,983.20, 120,016.80 and 51,159.60

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Solution

The fourth proportional to 86,983.20, 120,016.80 and 51,159.60 is: 70,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,983.20 : 120,016.80 = 51,159.60 : x
  2. Step 2: Convert to fraction form
    86,983.20/120,016.80 = 51,159.60/x
  3. Step 3: Cross multiply
    86,983.20x = 120,016.80 × 51,159.60
  4. Step 4: Simplify right side
    86,983.20x = 6,140,011,481.28
  5. Step 5: Solve for x
    x = 6,140,011,481.28/86,983.20
  6. Step 6: Final answer
    x = 70,588.48

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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.