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Finding the Fourth Proportional to 156,358.38, 215,774.58 and 84,738.39

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Solution

The fourth proportional to 156,358.38, 215,774.58 and 84,738.39 is: 116,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,358.38 : 215,774.58 = 84,738.39 : x
  2. Step 2: Convert to fraction form
    156,358.38/215,774.58 = 84,738.39/x
  3. Step 3: Cross multiply
    156,358.38x = 215,774.58 × 84,738.39
  4. Step 4: Simplify right side
    156,358.38x = 18,284,389,433.25
  5. Step 5: Solve for x
    x = 18,284,389,433.25/156,358.38
  6. Step 6: Final answer
    x = 116,938.98

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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.