Home / 131,448.20-197,172.30-78,830.60

Finding the Fourth Proportional to 131,448.20, 197,172.30 and 78,830.60

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Solution

The fourth proportional to 131,448.20, 197,172.30 and 78,830.60 is: 118,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,448.20 : 197,172.30 = 78,830.60 : x
  2. Step 2: Convert to fraction form
    131,448.20/197,172.30 = 78,830.60/x
  3. Step 3: Cross multiply
    131,448.20x = 197,172.30 × 78,830.60
  4. Step 4: Simplify right side
    131,448.20x = 15,543,210,712.38
  5. Step 5: Solve for x
    x = 15,543,210,712.38/131,448.20
  6. Step 6: Final answer
    x = 118,245.90

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1.5x scale

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.