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Finding the Fourth Proportional to 56,675.40, 85,010.40 and 19,231.80

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Solution

The fourth proportional to 56,675.40, 85,010.40 and 19,231.80 is: 28,846.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,675.40 : 85,010.40 = 19,231.80 : x
  2. Step 2: Convert to fraction form
    56,675.40/85,010.40 = 19,231.80/x
  3. Step 3: Cross multiply
    56,675.40x = 85,010.40 × 19,231.80
  4. Step 4: Simplify right side
    56,675.40x = 1,634,903,010.72
  5. Step 5: Solve for x
    x = 1,634,903,010.72/56,675.40
  6. Step 6: Final answer
    x = 28,846.78

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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.