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Finding the Fourth Proportional to 323,731.20, 485,596.80 and 99,091.20

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Solution

The fourth proportional to 323,731.20, 485,596.80 and 99,091.20 is: 148,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,731.20 : 485,596.80 = 99,091.20 : x
  2. Step 2: Convert to fraction form
    323,731.20/485,596.80 = 99,091.20/x
  3. Step 3: Cross multiply
    323,731.20x = 485,596.80 × 99,091.20
  4. Step 4: Simplify right side
    323,731.20x = 48,118,369,628.16
  5. Step 5: Solve for x
    x = 48,118,369,628.16/323,731.20
  6. Step 6: Final answer
    x = 148,636.80

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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.