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Finding the Fourth Proportional to 72,655.60, 109,069.80 and 41,090.80

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Solution

The fourth proportional to 72,655.60, 109,069.80 and 41,090.80 is: 61,685.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,655.60 : 109,069.80 = 41,090.80 : x
  2. Step 2: Convert to fraction form
    72,655.60/109,069.80 = 41,090.80/x
  3. Step 3: Cross multiply
    72,655.60x = 109,069.80 × 41,090.80
  4. Step 4: Simplify right side
    72,655.60x = 4,481,765,337.84
  5. Step 5: Solve for x
    x = 4,481,765,337.84/72,655.60
  6. Step 6: Final answer
    x = 61,685.06

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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.