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Finding the Fourth Proportional to 67,903.88, 101,856.56 and 20,519.36

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Solution

The fourth proportional to 67,903.88, 101,856.56 and 20,519.36 is: 30,779.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,903.88 : 101,856.56 = 20,519.36 : x
  2. Step 2: Convert to fraction form
    67,903.88/101,856.56 = 20,519.36/x
  3. Step 3: Cross multiply
    67,903.88x = 101,856.56 × 20,519.36
  4. Step 4: Simplify right side
    67,903.88x = 2,090,030,811.12
  5. Step 5: Solve for x
    x = 2,090,030,811.12/67,903.88
  6. Step 6: Final answer
    x = 30,779.26

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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.