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Finding the Fourth Proportional to 85,671.30, 127,893.78 and 74,464.30

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Solution

The fourth proportional to 85,671.30, 127,893.78 and 74,464.30 is: 111,163.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,671.30 : 127,893.78 = 74,464.30 : x
  2. Step 2: Convert to fraction form
    85,671.30/127,893.78 = 74,464.30/x
  3. Step 3: Cross multiply
    85,671.30x = 127,893.78 × 74,464.30
  4. Step 4: Simplify right side
    85,671.30x = 9,523,520,802.05
  5. Step 5: Solve for x
    x = 9,523,520,802.05/85,671.30
  6. Step 6: Final answer
    x = 111,163.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.