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Finding the Fourth Proportional to 123,254.10, 184,553.10 and 78,639.30

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Solution

The fourth proportional to 123,254.10, 184,553.10 and 78,639.30 is: 117,749.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,254.10 : 184,553.10 = 78,639.30 : x
  2. Step 2: Convert to fraction form
    123,254.10/184,553.10 = 78,639.30/x
  3. Step 3: Cross multiply
    123,254.10x = 184,553.10 × 78,639.30
  4. Step 4: Simplify right side
    123,254.10x = 14,513,126,596.83
  5. Step 5: Solve for x
    x = 14,513,126,596.83/123,254.10
  6. Step 6: Final answer
    x = 117,749.65

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1.5x scale

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.