Home / 128,147.58-192,236.76-53,318.36

Finding the Fourth Proportional to 128,147.58, 192,236.76 and 53,318.36

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Solution

The fourth proportional to 128,147.58, 192,236.76 and 53,318.36 is: 79,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,147.58 : 192,236.76 = 53,318.36 : x
  2. Step 2: Convert to fraction form
    128,147.58/192,236.76 = 53,318.36/x
  3. Step 3: Cross multiply
    128,147.58x = 192,236.76 × 53,318.36
  4. Step 4: Simplify right side
    128,147.58x = 10,249,749,255.51
  5. Step 5: Solve for x
    x = 10,249,749,255.51/128,147.58
  6. Step 6: Final answer
    x = 79,983.95

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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.