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Finding the Fourth Proportional to 78,263.43, 107,883.69 and 47,992.62

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Solution

The fourth proportional to 78,263.43, 107,883.69 and 47,992.62 is: 66,156.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,263.43 : 107,883.69 = 47,992.62 : x
  2. Step 2: Convert to fraction form
    78,263.43/107,883.69 = 47,992.62/x
  3. Step 3: Cross multiply
    78,263.43x = 107,883.69 × 47,992.62
  4. Step 4: Simplify right side
    78,263.43x = 5,177,620,938.37
  5. Step 5: Solve for x
    x = 5,177,620,938.37/78,263.43
  6. Step 6: Final answer
    x = 66,156.33

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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.