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Finding the Fourth Proportional to 53,167.88, 79,765.65 and 19,890.54

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Solution

The fourth proportional to 53,167.88, 79,765.65 and 19,890.54 is: 29,840.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,167.88 : 79,765.65 = 19,890.54 : x
  2. Step 2: Convert to fraction form
    53,167.88/79,765.65 = 19,890.54/x
  3. Step 3: Cross multiply
    53,167.88x = 79,765.65 × 19,890.54
  4. Step 4: Simplify right side
    53,167.88x = 1,586,581,851.95
  5. Step 5: Solve for x
    x = 1,586,581,851.95/53,167.88
  6. Step 6: Final answer
    x = 29,840.99

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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.