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Finding the Fourth Proportional to 156,679.80, 216,078.89 and 126,455.46

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Solution

The fourth proportional to 156,679.80, 216,078.89 and 126,455.46 is: 174,396.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,679.80 : 216,078.89 = 126,455.46 : x
  2. Step 2: Convert to fraction form
    156,679.80/216,078.89 = 126,455.46/x
  3. Step 3: Cross multiply
    156,679.80x = 216,078.89 × 126,455.46
  4. Step 4: Simplify right side
    156,679.80x = 27,324,354,798.96
  5. Step 5: Solve for x
    x = 27,324,354,798.96/156,679.80
  6. Step 6: Final answer
    x = 174,396.16

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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.