Home / 122,721.40-184,082.10-85,396.60

Finding the Fourth Proportional to 122,721.40, 184,082.10 and 85,396.60

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Solution

The fourth proportional to 122,721.40, 184,082.10 and 85,396.60 is: 128,094.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,721.40 : 184,082.10 = 85,396.60 : x
  2. Step 2: Convert to fraction form
    122,721.40/184,082.10 = 85,396.60/x
  3. Step 3: Cross multiply
    122,721.40x = 184,082.10 × 85,396.60
  4. Step 4: Simplify right side
    122,721.40x = 15,719,985,460.86
  5. Step 5: Solve for x
    x = 15,719,985,460.86/122,721.40
  6. Step 6: Final answer
    x = 128,094.90

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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.