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Finding the Fourth Proportional to 72,630.57, 100,219.28 and 40,793.37

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Solution

The fourth proportional to 72,630.57, 100,219.28 and 40,793.37 is: 56,288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.57 : 100,219.28 = 40,793.37 : x
  2. Step 2: Convert to fraction form
    72,630.57/100,219.28 = 40,793.37/x
  3. Step 3: Cross multiply
    72,630.57x = 100,219.28 × 40,793.37
  4. Step 4: Simplify right side
    72,630.57x = 4,088,281,966.21
  5. Step 5: Solve for x
    x = 4,088,281,966.21/72,630.57
  6. Step 6: Final answer
    x = 56,288.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.