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Finding the Fourth Proportional to 81,255.77, 121,898.90 and 36,885.63

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Solution

The fourth proportional to 81,255.77, 121,898.90 and 36,885.63 is: 55,335.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.77 : 121,898.90 = 36,885.63 : x
  2. Step 2: Convert to fraction form
    81,255.77/121,898.90 = 36,885.63/x
  3. Step 3: Cross multiply
    81,255.77x = 121,898.90 × 36,885.63
  4. Step 4: Simplify right side
    81,255.77x = 4,496,317,815.02
  5. Step 5: Solve for x
    x = 4,496,317,815.02/81,255.77
  6. Step 6: Final answer
    x = 55,335.37

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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.