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Finding the Fourth Proportional to 323,780.45, 485,628.15 and 99,163.40

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Solution

The fourth proportional to 323,780.45, 485,628.15 and 99,163.40 is: 148,732.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,780.45 : 485,628.15 = 99,163.40 : x
  2. Step 2: Convert to fraction form
    323,780.45/485,628.15 = 99,163.40/x
  3. Step 3: Cross multiply
    323,780.45x = 485,628.15 × 99,163.40
  4. Step 4: Simplify right side
    323,780.45x = 48,156,538,489.71
  5. Step 5: Solve for x
    x = 48,156,538,489.71/323,780.45
  6. Step 6: Final answer
    x = 148,732.08

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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.