Home / 128,428.27-192,643.72-57,354.53

Finding the Fourth Proportional to 128,428.27, 192,643.72 and 57,354.53

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Solution

The fourth proportional to 128,428.27, 192,643.72 and 57,354.53 is: 86,032.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,428.27 : 192,643.72 = 57,354.53 : x
  2. Step 2: Convert to fraction form
    128,428.27/192,643.72 = 57,354.53/x
  3. Step 3: Cross multiply
    128,428.27x = 192,643.72 × 57,354.53
  4. Step 4: Simplify right side
    128,428.27x = 11,048,988,911.45
  5. Step 5: Solve for x
    x = 11,048,988,911.45/128,428.27
  6. Step 6: Final answer
    x = 86,032.38

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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.