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Finding the Fourth Proportional to 75,108.11, 112,659.21 and 18,947.48

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Solution

The fourth proportional to 75,108.11, 112,659.21 and 18,947.48 is: 28,420.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,108.11 : 112,659.21 = 18,947.48 : x
  2. Step 2: Convert to fraction form
    75,108.11/112,659.21 = 18,947.48/x
  3. Step 3: Cross multiply
    75,108.11x = 112,659.21 × 18,947.48
  4. Step 4: Simplify right side
    75,108.11x = 2,134,607,564.99
  5. Step 5: Solve for x
    x = 2,134,607,564.99/75,108.11
  6. Step 6: Final answer
    x = 28,420.47

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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.