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Finding the Fourth Proportional to 140,889.80, 210,984.10 and 98,571.90

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Solution

The fourth proportional to 140,889.80, 210,984.10 and 98,571.90 is: 147,612.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,889.80 : 210,984.10 = 98,571.90 : x
  2. Step 2: Convert to fraction form
    140,889.80/210,984.10 = 98,571.90/x
  3. Step 3: Cross multiply
    140,889.80x = 210,984.10 × 98,571.90
  4. Step 4: Simplify right side
    140,889.80x = 20,797,103,606.79
  5. Step 5: Solve for x
    x = 20,797,103,606.79/140,889.80
  6. Step 6: Final answer
    x = 147,612.56

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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.