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Finding the Fourth Proportional to 122,720.40, 184,082.30 and 80,868.40

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Solution

The fourth proportional to 122,720.40, 184,082.30 and 80,868.40 is: 121,303.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,720.40 : 184,082.30 = 80,868.40 : x
  2. Step 2: Convert to fraction form
    122,720.40/184,082.30 = 80,868.40/x
  3. Step 3: Cross multiply
    122,720.40x = 184,082.30 × 80,868.40
  4. Step 4: Simplify right side
    122,720.40x = 14,886,441,069.32
  5. Step 5: Solve for x
    x = 14,886,441,069.32/122,720.40
  6. Step 6: Final answer
    x = 121,303.72

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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.