Home / 128,546.28-192,828.42-39,788.10

Finding the Fourth Proportional to 128,546.28, 192,828.42 and 39,788.10

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Solution

The fourth proportional to 128,546.28, 192,828.42 and 39,788.10 is: 59,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,546.28 : 192,828.42 = 39,788.10 : x
  2. Step 2: Convert to fraction form
    128,546.28/192,828.42 = 39,788.10/x
  3. Step 3: Cross multiply
    128,546.28x = 192,828.42 × 39,788.10
  4. Step 4: Simplify right side
    128,546.28x = 7,672,276,457.80
  5. Step 5: Solve for x
    x = 7,672,276,457.80/128,546.28
  6. Step 6: Final answer
    x = 59,684.94

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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.