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Finding the Fourth Proportional to 92,912.77, 128,230.38 and 87,212.60

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Solution

The fourth proportional to 92,912.77, 128,230.38 and 87,212.60 is: 120,363.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.77 : 128,230.38 = 87,212.60 : x
  2. Step 2: Convert to fraction form
    92,912.77/128,230.38 = 87,212.60/x
  3. Step 3: Cross multiply
    92,912.77x = 128,230.38 × 87,212.60
  4. Step 4: Simplify right side
    92,912.77x = 11,183,303,761.57
  5. Step 5: Solve for x
    x = 11,183,303,761.57/92,912.77
  6. Step 6: Final answer
    x = 120,363.48

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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.