Home / 123,311.40-184,967.10-85,986.60

Finding the Fourth Proportional to 123,311.40, 184,967.10 and 85,986.60

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Solution

The fourth proportional to 123,311.40, 184,967.10 and 85,986.60 is: 128,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,311.40 : 184,967.10 = 85,986.60 : x
  2. Step 2: Convert to fraction form
    123,311.40/184,967.10 = 85,986.60/x
  3. Step 3: Cross multiply
    123,311.40x = 184,967.10 × 85,986.60
  4. Step 4: Simplify right side
    123,311.40x = 15,904,692,040.86
  5. Step 5: Solve for x
    x = 15,904,692,040.86/123,311.40
  6. Step 6: Final answer
    x = 128,979.90

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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.