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Finding the Fourth Proportional to 113,630, 156,645.44 and 79,532.96

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Solution

The fourth proportional to 113,630, 156,645.44 and 79,532.96 is: 109,640.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,630 : 156,645.44 = 79,532.96 : x
  2. Step 2: Convert to fraction form
    113,630/156,645.44 = 79,532.96/x
  3. Step 3: Cross multiply
    113,630x = 156,645.44 × 79,532.96
  4. Step 4: Simplify right side
    113,630x = 12,458,475,513.70
  5. Step 5: Solve for x
    x = 12,458,475,513.70/113,630
  6. Step 6: Final answer
    x = 109,640.72

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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.