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Finding the Fourth Proportional to 80,654.98, 120,745.89 and 56,555.73

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Solution

The fourth proportional to 80,654.98, 120,745.89 and 56,555.73 is: 84,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,654.98 : 120,745.89 = 56,555.73 : x
  2. Step 2: Convert to fraction form
    80,654.98/120,745.89 = 56,555.73/x
  3. Step 3: Cross multiply
    80,654.98x = 120,745.89 × 56,555.73
  4. Step 4: Simplify right side
    80,654.98x = 6,828,871,953.45
  5. Step 5: Solve for x
    x = 6,828,871,953.45/80,654.98
  6. Step 6: Final answer
    x = 84,667.70

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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.