Home / 87,455.12-120,688.08-49,731.68

Finding the Fourth Proportional to 87,455.12, 120,688.08 and 49,731.68

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Solution

The fourth proportional to 87,455.12, 120,688.08 and 49,731.68 is: 68,629.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,455.12 : 120,688.08 = 49,731.68 : x
  2. Step 2: Convert to fraction form
    87,455.12/120,688.08 = 49,731.68/x
  3. Step 3: Cross multiply
    87,455.12x = 120,688.08 × 49,731.68
  4. Step 4: Simplify right side
    87,455.12x = 6,002,020,974.37
  5. Step 5: Solve for x
    x = 6,002,020,974.37/87,455.12
  6. Step 6: Final answer
    x = 68,629.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.