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Finding the Fourth Proportional to 122,960.60, 184,440.90 and 75,721.40

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Solution

The fourth proportional to 122,960.60, 184,440.90 and 75,721.40 is: 113,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,960.60 : 184,440.90 = 75,721.40 : x
  2. Step 2: Convert to fraction form
    122,960.60/184,440.90 = 75,721.40/x
  3. Step 3: Cross multiply
    122,960.60x = 184,440.90 × 75,721.40
  4. Step 4: Simplify right side
    122,960.60x = 13,966,123,165.26
  5. Step 5: Solve for x
    x = 13,966,123,165.26/122,960.60
  6. Step 6: Final answer
    x = 113,582.10

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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.