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Finding the Fourth Proportional to 113,626, 156,639.92 and 79,528.96

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Solution

The fourth proportional to 113,626, 156,639.92 and 79,528.96 is: 109,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,626 : 156,639.92 = 79,528.96 : x
  2. Step 2: Convert to fraction form
    113,626/156,639.92 = 79,528.96/x
  3. Step 3: Cross multiply
    113,626x = 156,639.92 × 79,528.96
  4. Step 4: Simplify right side
    113,626x = 12,457,409,932.08
  5. Step 5: Solve for x
    x = 12,457,409,932.08/113,626
  6. Step 6: Final answer
    x = 109,635.21

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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.