Home / 86,941.20-130,120.20-76,443.60

Finding the Fourth Proportional to 86,941.20, 130,120.20 and 76,443.60

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Solution

The fourth proportional to 86,941.20, 130,120.20 and 76,443.60 is: 114,409.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,941.20 : 130,120.20 = 76,443.60 : x
  2. Step 2: Convert to fraction form
    86,941.20/130,120.20 = 76,443.60/x
  3. Step 3: Cross multiply
    86,941.20x = 130,120.20 × 76,443.60
  4. Step 4: Simplify right side
    86,941.20x = 9,946,856,520.72
  5. Step 5: Solve for x
    x = 9,946,856,520.72/86,941.20
  6. Step 6: Final answer
    x = 114,409.01

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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.