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Finding the Fourth Proportional to 156,358.63, 215,774.93 and 84,738.64

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Solution

The fourth proportional to 156,358.63, 215,774.93 and 84,738.64 is: 116,939.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,358.63 : 215,774.93 = 84,738.64 : x
  2. Step 2: Convert to fraction form
    156,358.63/215,774.93 = 84,738.64/x
  3. Step 3: Cross multiply
    156,358.63x = 215,774.93 × 84,738.64
  4. Step 4: Simplify right side
    156,358.63x = 18,284,472,611.73
  5. Step 5: Solve for x
    x = 18,284,472,611.73/156,358.63
  6. Step 6: Final answer
    x = 116,939.32

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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.