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Finding the Fourth Proportional to 72,856.45, 109,255.87 and 35,405.43

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Solution

The fourth proportional to 72,856.45, 109,255.87 and 35,405.43 is: 53,094.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,856.45 : 109,255.87 = 35,405.43 : x
  2. Step 2: Convert to fraction form
    72,856.45/109,255.87 = 35,405.43/x
  3. Step 3: Cross multiply
    72,856.45x = 109,255.87 × 35,405.43
  4. Step 4: Simplify right side
    72,856.45x = 3,868,251,057.37
  5. Step 5: Solve for x
    x = 3,868,251,057.37/72,856.45
  6. Step 6: Final answer
    x = 53,094.15

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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.