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Finding the Fourth Proportional to 156,340.96, 215,765.12 and 89,260

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Solution

The fourth proportional to 156,340.96, 215,765.12 and 89,260 is: 123,187.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,340.96 : 215,765.12 = 89,260 : x
  2. Step 2: Convert to fraction form
    156,340.96/215,765.12 = 89,260/x
  3. Step 3: Cross multiply
    156,340.96x = 215,765.12 × 89,260
  4. Step 4: Simplify right side
    156,340.96x = 19,259,194,611.20
  5. Step 5: Solve for x
    x = 19,259,194,611.20/156,340.96
  6. Step 6: Final answer
    x = 123,187.13

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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.