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Finding the Fourth Proportional to 128,280.50, 177,037.82 and 85,183.84

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Solution

The fourth proportional to 128,280.50, 177,037.82 and 85,183.84 is: 117,560.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.50 : 177,037.82 = 85,183.84 : x
  2. Step 2: Convert to fraction form
    128,280.50/177,037.82 = 85,183.84/x
  3. Step 3: Cross multiply
    128,280.50x = 177,037.82 × 85,183.84
  4. Step 4: Simplify right side
    128,280.50x = 15,080,761,332.83
  5. Step 5: Solve for x
    x = 15,080,761,332.83/128,280.50
  6. Step 6: Final answer
    x = 117,560.82

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1.5x scale

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.