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Finding the Fourth Proportional to 309,990.60, 465,029.10 and 132,496.20

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Solution

The fourth proportional to 309,990.60, 465,029.10 and 132,496.20 is: 198,762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,990.60 : 465,029.10 = 132,496.20 : x
  2. Step 2: Convert to fraction form
    309,990.60/465,029.10 = 132,496.20/x
  3. Step 3: Cross multiply
    309,990.60x = 465,029.10 × 132,496.20
  4. Step 4: Simplify right side
    309,990.60x = 61,614,588,639.42
  5. Step 5: Solve for x
    x = 61,614,588,639.42/309,990.60
  6. Step 6: Final answer
    x = 198,762.76

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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.