Home / 98,128.20-146,900.70-87,630.60

Finding the Fourth Proportional to 98,128.20, 146,900.70 and 87,630.60

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Solution

The fourth proportional to 98,128.20, 146,900.70 and 87,630.60 is: 131,185.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128.20 : 146,900.70 = 87,630.60 : x
  2. Step 2: Convert to fraction form
    98,128.20/146,900.70 = 87,630.60/x
  3. Step 3: Cross multiply
    98,128.20x = 146,900.70 × 87,630.60
  4. Step 4: Simplify right side
    98,128.20x = 12,872,996,481.42
  5. Step 5: Solve for x
    x = 12,872,996,481.42/98,128.20
  6. Step 6: Final answer
    x = 131,185.49

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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.