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Finding the Fourth Proportional to 128,429.28, 192,624.48 and 34,942.32

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Solution

The fourth proportional to 128,429.28, 192,624.48 and 34,942.32 is: 52,408.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.28 : 192,624.48 = 34,942.32 : x
  2. Step 2: Convert to fraction form
    128,429.28/192,624.48 = 34,942.32/x
  3. Step 3: Cross multiply
    128,429.28x = 192,624.48 × 34,942.32
  4. Step 4: Simplify right side
    128,429.28x = 6,730,746,219.99
  5. Step 5: Solve for x
    x = 6,730,746,219.99/128,429.28
  6. Step 6: Final answer
    x = 52,408.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.