Home / 98,998.20-148,497.30-91,999.80

Finding the Fourth Proportional to 98,998.20, 148,497.30 and 91,999.80

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Solution

The fourth proportional to 98,998.20, 148,497.30 and 91,999.80 is: 137,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,998.20 : 148,497.30 = 91,999.80 : x
  2. Step 2: Convert to fraction form
    98,998.20/148,497.30 = 91,999.80/x
  3. Step 3: Cross multiply
    98,998.20x = 148,497.30 × 91,999.80
  4. Step 4: Simplify right side
    98,998.20x = 13,661,721,900.54
  5. Step 5: Solve for x
    x = 13,661,721,900.54/98,998.20
  6. Step 6: Final answer
    x = 137,999.70

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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.