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Finding the Fourth Proportional to 64,961.55, 89,644.37 and 40,775.40

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Solution

The fourth proportional to 64,961.55, 89,644.37 and 40,775.40 is: 56,268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,961.55 : 89,644.37 = 40,775.40 : x
  2. Step 2: Convert to fraction form
    64,961.55/89,644.37 = 40,775.40/x
  3. Step 3: Cross multiply
    64,961.55x = 89,644.37 × 40,775.40
  4. Step 4: Simplify right side
    64,961.55x = 3,655,284,840.62
  5. Step 5: Solve for x
    x = 3,655,284,840.62/64,961.55
  6. Step 6: Final answer
    x = 56,268.44

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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.