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Finding the Fourth Proportional to 323,765.70, 485,648.55 and 99,125.70

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Solution

The fourth proportional to 323,765.70, 485,648.55 and 99,125.70 is: 148,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,765.70 : 485,648.55 = 99,125.70 : x
  2. Step 2: Convert to fraction form
    323,765.70/485,648.55 = 99,125.70/x
  3. Step 3: Cross multiply
    323,765.70x = 485,648.55 × 99,125.70
  4. Step 4: Simplify right side
    323,765.70x = 48,140,252,472.74
  5. Step 5: Solve for x
    x = 48,140,252,472.74/323,765.70
  6. Step 6: Final answer
    x = 148,688.55

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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.