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Finding the Fourth Proportional to 57,240.90, 85,910.74 and 39,723.02

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Solution

The fourth proportional to 57,240.90, 85,910.74 and 39,723.02 is: 59,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,240.90 : 85,910.74 = 39,723.02 : x
  2. Step 2: Convert to fraction form
    57,240.90/85,910.74 = 39,723.02/x
  3. Step 3: Cross multiply
    57,240.90x = 85,910.74 × 39,723.02
  4. Step 4: Simplify right side
    57,240.90x = 3,412,634,043.23
  5. Step 5: Solve for x
    x = 3,412,634,043.23/57,240.90
  6. Step 6: Final answer
    x = 59,618.80

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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.