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Finding the Fourth Proportional to 81,255.64, 121,898.72 and 36,885.51

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Solution

The fourth proportional to 81,255.64, 121,898.72 and 36,885.51 is: 55,335.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.64 : 121,898.72 = 36,885.51 : x
  2. Step 2: Convert to fraction form
    81,255.64/121,898.72 = 36,885.51/x
  3. Step 3: Cross multiply
    81,255.64x = 121,898.72 × 36,885.51
  4. Step 4: Simplify right side
    81,255.64x = 4,496,296,455.55
  5. Step 5: Solve for x
    x = 4,496,296,455.55/81,255.64
  6. Step 6: Final answer
    x = 55,335.19

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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.