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Finding the Fourth Proportional to 72,553.89, 100,118.87 and 40,716.63

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Solution

The fourth proportional to 72,553.89, 100,118.87 and 40,716.63 is: 56,185.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,553.89 : 100,118.87 = 40,716.63 : x
  2. Step 2: Convert to fraction form
    72,553.89/100,118.87 = 40,716.63/x
  3. Step 3: Cross multiply
    72,553.89x = 100,118.87 × 40,716.63
  4. Step 4: Simplify right side
    72,553.89x = 4,076,503,216.50
  5. Step 5: Solve for x
    x = 4,076,503,216.50/72,553.89
  6. Step 6: Final answer
    x = 56,185.87

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1.5x scale

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.