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Finding the Fourth Proportional to 85,390.20, 128,037.30 and 32,801.40

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Solution

The fourth proportional to 85,390.20, 128,037.30 and 32,801.40 is: 49,183.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,390.20 : 128,037.30 = 32,801.40 : x
  2. Step 2: Convert to fraction form
    85,390.20/128,037.30 = 32,801.40/x
  3. Step 3: Cross multiply
    85,390.20x = 128,037.30 × 32,801.40
  4. Step 4: Simplify right side
    85,390.20x = 4,199,802,692.22
  5. Step 5: Solve for x
    x = 4,199,802,692.22/85,390.20
  6. Step 6: Final answer
    x = 49,183.66

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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.