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Finding the Fourth Proportional to 98,999.80, 148,378.20 and 67,409.80

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Solution

The fourth proportional to 98,999.80, 148,378.20 and 67,409.80 is: 101,031.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,999.80 : 148,378.20 = 67,409.80 : x
  2. Step 2: Convert to fraction form
    98,999.80/148,378.20 = 67,409.80/x
  3. Step 3: Cross multiply
    98,999.80x = 148,378.20 × 67,409.80
  4. Step 4: Simplify right side
    98,999.80x = 10,002,144,786.36
  5. Step 5: Solve for x
    x = 10,002,144,786.36/98,999.80
  6. Step 6: Final answer
    x = 101,031.97

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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.