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Finding the Fourth Proportional to 72,985.96, 100,720.46 and 41,154.63

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Solution

The fourth proportional to 72,985.96, 100,720.46 and 41,154.63 is: 56,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.96 : 100,720.46 = 41,154.63 : x
  2. Step 2: Convert to fraction form
    72,985.96/100,720.46 = 41,154.63/x
  3. Step 3: Cross multiply
    72,985.96x = 100,720.46 × 41,154.63
  4. Step 4: Simplify right side
    72,985.96x = 4,145,113,556.47
  5. Step 5: Solve for x
    x = 4,145,113,556.47/72,985.96
  6. Step 6: Final answer
    x = 56,793.30

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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.