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Finding the Fourth Proportional to 126,630.60, 189,792.30 and 56,435.40

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Solution

The fourth proportional to 126,630.60, 189,792.30 and 56,435.40 is: 84,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,630.60 : 189,792.30 = 56,435.40 : x
  2. Step 2: Convert to fraction form
    126,630.60/189,792.30 = 56,435.40/x
  3. Step 3: Cross multiply
    126,630.60x = 189,792.30 × 56,435.40
  4. Step 4: Simplify right side
    126,630.60x = 10,711,004,367.42
  5. Step 5: Solve for x
    x = 10,711,004,367.42/126,630.60
  6. Step 6: Final answer
    x = 84,584.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.