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Finding the Fourth Proportional to 57,770.40, 86,655.60 and 18,330.60

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Solution

The fourth proportional to 57,770.40, 86,655.60 and 18,330.60 is: 27,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,770.40 : 86,655.60 = 18,330.60 : x
  2. Step 2: Convert to fraction form
    57,770.40/86,655.60 = 18,330.60/x
  3. Step 3: Cross multiply
    57,770.40x = 86,655.60 × 18,330.60
  4. Step 4: Simplify right side
    57,770.40x = 1,588,449,141.36
  5. Step 5: Solve for x
    x = 1,588,449,141.36/57,770.40
  6. Step 6: Final answer
    x = 27,495.90

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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.