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Finding the Fourth Proportional to 128,320.88, 192,514.53 and 39,572.42

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Solution

The fourth proportional to 128,320.88, 192,514.53 and 39,572.42 is: 59,368.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.88 : 192,514.53 = 39,572.42 : x
  2. Step 2: Convert to fraction form
    128,320.88/192,514.53 = 39,572.42/x
  3. Step 3: Cross multiply
    128,320.88x = 192,514.53 × 39,572.42
  4. Step 4: Simplify right side
    128,320.88x = 7,618,265,837.26
  5. Step 5: Solve for x
    x = 7,618,265,837.26/128,320.88
  6. Step 6: Final answer
    x = 59,368.87

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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.