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Finding the Fourth Proportional to 92,912.49, 128,212.86 and 50,470.11

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Solution

The fourth proportional to 92,912.49, 128,212.86 and 50,470.11 is: 69,645.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.49 : 128,212.86 = 50,470.11 : x
  2. Step 2: Convert to fraction form
    92,912.49/128,212.86 = 50,470.11/x
  3. Step 3: Cross multiply
    92,912.49x = 128,212.86 × 50,470.11
  4. Step 4: Simplify right side
    92,912.49x = 6,470,917,147.61
  5. Step 5: Solve for x
    x = 6,470,917,147.61/92,912.49
  6. Step 6: Final answer
    x = 69,645.29

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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.