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Finding the Fourth Proportional to 79,015.56, 109,043.19 and 47,178.51

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Solution

The fourth proportional to 79,015.56, 109,043.19 and 47,178.51 is: 65,107.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,015.56 : 109,043.19 = 47,178.51 : x
  2. Step 2: Convert to fraction form
    79,015.56/109,043.19 = 47,178.51/x
  3. Step 3: Cross multiply
    79,015.56x = 109,043.19 × 47,178.51
  4. Step 4: Simplify right side
    79,015.56x = 5,144,495,229.85
  5. Step 5: Solve for x
    x = 5,144,495,229.85/79,015.56
  6. Step 6: Final answer
    x = 65,107.37

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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.