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Finding the Fourth Proportional to 156,408.30, 215,832.60 and 88,428.60

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Solution

The fourth proportional to 156,408.30, 215,832.60 and 88,428.60 is: 122,025.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,408.30 : 215,832.60 = 88,428.60 : x
  2. Step 2: Convert to fraction form
    156,408.30/215,832.60 = 88,428.60/x
  3. Step 3: Cross multiply
    156,408.30x = 215,832.60 × 88,428.60
  4. Step 4: Simplify right side
    156,408.30x = 19,085,774,652.36
  5. Step 5: Solve for x
    x = 19,085,774,652.36/156,408.30
  6. Step 6: Final answer
    x = 122,025.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.