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Finding the Fourth Proportional to 77,581.96, 116,372.76 and 20,655.88

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Solution

The fourth proportional to 77,581.96, 116,372.76 and 20,655.88 is: 30,983.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,581.96 : 116,372.76 = 20,655.88 : x
  2. Step 2: Convert to fraction form
    77,581.96/116,372.76 = 20,655.88/x
  3. Step 3: Cross multiply
    77,581.96x = 116,372.76 × 20,655.88
  4. Step 4: Simplify right side
    77,581.96x = 2,403,781,765.83
  5. Step 5: Solve for x
    x = 2,403,781,765.83/77,581.96
  6. Step 6: Final answer
    x = 30,983.77

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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.