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Finding the Fourth Proportional to 122,990.80, 184,432.20 and 56,408.80

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Solution

The fourth proportional to 122,990.80, 184,432.20 and 56,408.80 is: 84,588.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,990.80 : 184,432.20 = 56,408.80 : x
  2. Step 2: Convert to fraction form
    122,990.80/184,432.20 = 56,408.80/x
  3. Step 3: Cross multiply
    122,990.80x = 184,432.20 × 56,408.80
  4. Step 4: Simplify right side
    122,990.80x = 10,403,599,083.36
  5. Step 5: Solve for x
    x = 10,403,599,083.36/122,990.80
  6. Step 6: Final answer
    x = 84,588.43

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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.