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Finding the Fourth Proportional to 123,292.32, 184,938.48 and 78,939.96

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Solution

The fourth proportional to 123,292.32, 184,938.48 and 78,939.96 is: 118,409.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,292.32 : 184,938.48 = 78,939.96 : x
  2. Step 2: Convert to fraction form
    123,292.32/184,938.48 = 78,939.96/x
  3. Step 3: Cross multiply
    123,292.32x = 184,938.48 × 78,939.96
  4. Step 4: Simplify right side
    123,292.32x = 14,599,036,213.66
  5. Step 5: Solve for x
    x = 14,599,036,213.66/123,292.32
  6. Step 6: Final answer
    x = 118,409.94

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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.