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Finding the Fourth Proportional to 133,425.64, 184,123.85 and 78,980.61

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Solution

The fourth proportional to 133,425.64, 184,123.85 and 78,980.61 is: 108,991.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,425.64 : 184,123.85 = 78,980.61 : x
  2. Step 2: Convert to fraction form
    133,425.64/184,123.85 = 78,980.61/x
  3. Step 3: Cross multiply
    133,425.64x = 184,123.85 × 78,980.61
  4. Step 4: Simplify right side
    133,425.64x = 14,542,214,186.00
  5. Step 5: Solve for x
    x = 14,542,214,186.00/133,425.64
  6. Step 6: Final answer
    x = 108,991.15

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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.