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Finding the Fourth Proportional to 123,279.60, 184,919.40 and 102,543.60

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Solution

The fourth proportional to 123,279.60, 184,919.40 and 102,543.60 is: 153,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,279.60 : 184,919.40 = 102,543.60 : x
  2. Step 2: Convert to fraction form
    123,279.60/184,919.40 = 102,543.60/x
  3. Step 3: Cross multiply
    123,279.60x = 184,919.40 × 102,543.60
  4. Step 4: Simplify right side
    123,279.60x = 18,962,300,985.84
  5. Step 5: Solve for x
    x = 18,962,300,985.84/123,279.60
  6. Step 6: Final answer
    x = 153,815.40

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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.