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Finding the Fourth Proportional to 156,314.64, 215,628.12 and 92,640.72

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Solution

The fourth proportional to 156,314.64, 215,628.12 and 92,640.72 is: 127,793.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,314.64 : 215,628.12 = 92,640.72 : x
  2. Step 2: Convert to fraction form
    156,314.64/215,628.12 = 92,640.72/x
  3. Step 3: Cross multiply
    156,314.64x = 215,628.12 × 92,640.72
  4. Step 4: Simplify right side
    156,314.64x = 19,975,944,289.05
  5. Step 5: Solve for x
    x = 19,975,944,289.05/156,314.64
  6. Step 6: Final answer
    x = 127,793.18

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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.