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Finding the Fourth Proportional to 72,986.70, 100,730.62 and 41,154.96

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Solution

The fourth proportional to 72,986.70, 100,730.62 and 41,154.96 is: 56,798.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,986.70 : 100,730.62 = 41,154.96 : x
  2. Step 2: Convert to fraction form
    72,986.70/100,730.62 = 41,154.96/x
  3. Step 3: Cross multiply
    72,986.70x = 100,730.62 × 41,154.96
  4. Step 4: Simplify right side
    72,986.70x = 4,145,564,636.88
  5. Step 5: Solve for x
    x = 4,145,564,636.88/72,986.70
  6. Step 6: Final answer
    x = 56,798.90

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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.