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Finding the Fourth Proportional to 128,386.62, 192,625.53 and 57,302.82

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Solution

The fourth proportional to 128,386.62, 192,625.53 and 57,302.82 is: 85,974.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,386.62 : 192,625.53 = 57,302.82 : x
  2. Step 2: Convert to fraction form
    128,386.62/192,625.53 = 57,302.82/x
  3. Step 3: Cross multiply
    128,386.62x = 192,625.53 × 57,302.82
  4. Step 4: Simplify right side
    128,386.62x = 11,037,986,072.99
  5. Step 5: Solve for x
    x = 11,037,986,072.99/128,386.62
  6. Step 6: Final answer
    x = 85,974.58

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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.