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Finding the Fourth Proportional to 85,785.68, 128,765.63 and 41,449.73

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Solution

The fourth proportional to 85,785.68, 128,765.63 and 41,449.73 is: 62,216.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,785.68 : 128,765.63 = 41,449.73 : x
  2. Step 2: Convert to fraction form
    85,785.68/128,765.63 = 41,449.73/x
  3. Step 3: Cross multiply
    85,785.68x = 128,765.63 × 41,449.73
  4. Step 4: Simplify right side
    85,785.68x = 5,337,300,056.58
  5. Step 5: Solve for x
    x = 5,337,300,056.58/85,785.68
  6. Step 6: Final answer
    x = 62,216.68

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1.5x scale

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.