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Finding the Fourth Proportional to 85,358.55, 128,037.83 and 85,358.55

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Solution

The fourth proportional to 85,358.55, 128,037.83 and 85,358.55 is: 128,037.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358.55 : 128,037.83 = 85,358.55 : x
  2. Step 2: Convert to fraction form
    85,358.55/128,037.83 = 85,358.55/x
  3. Step 3: Cross multiply
    85,358.55x = 128,037.83 × 85,358.55
  4. Step 4: Simplify right side
    85,358.55x = 10,929,123,087.15
  5. Step 5: Solve for x
    x = 10,929,123,087.15/85,358.55
  6. Step 6: Final answer
    x = 128,037.83

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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.