Home / 130,986.20-196,479.30-78,368.60

Finding the Fourth Proportional to 130,986.20, 196,479.30 and 78,368.60

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Solution

The fourth proportional to 130,986.20, 196,479.30 and 78,368.60 is: 117,552.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,986.20 : 196,479.30 = 78,368.60 : x
  2. Step 2: Convert to fraction form
    130,986.20/196,479.30 = 78,368.60/x
  3. Step 3: Cross multiply
    130,986.20x = 196,479.30 × 78,368.60
  4. Step 4: Simplify right side
    130,986.20x = 15,397,807,669.98
  5. Step 5: Solve for x
    x = 15,397,807,669.98/130,986.20
  6. Step 6: Final answer
    x = 117,552.90

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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.