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Finding the Fourth Proportional to 86,684.80, 130,027.20 and 80,204.80

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Solution

The fourth proportional to 86,684.80, 130,027.20 and 80,204.80 is: 120,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,684.80 : 130,027.20 = 80,204.80 : x
  2. Step 2: Convert to fraction form
    86,684.80/130,027.20 = 80,204.80/x
  3. Step 3: Cross multiply
    86,684.80x = 130,027.20 × 80,204.80
  4. Step 4: Simplify right side
    86,684.80x = 10,428,805,570.56
  5. Step 5: Solve for x
    x = 10,428,805,570.56/86,684.80
  6. Step 6: Final answer
    x = 120,307.20

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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.