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Finding the Fourth Proportional to 78,922.88, 108,912.92 and 43,112.90

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Solution

The fourth proportional to 78,922.88, 108,912.92 and 43,112.90 is: 59,495.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,922.88 : 108,912.92 = 43,112.90 : x
  2. Step 2: Convert to fraction form
    78,922.88/108,912.92 = 43,112.90/x
  3. Step 3: Cross multiply
    78,922.88x = 108,912.92 × 43,112.90
  4. Step 4: Simplify right side
    78,922.88x = 4,695,551,828.67
  5. Step 5: Solve for x
    x = 4,695,551,828.67/78,922.88
  6. Step 6: Final answer
    x = 59,495.44

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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.