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Finding the Fourth Proportional to 128,522.26, 192,792.40 and 39,764.08

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Solution

The fourth proportional to 128,522.26, 192,792.40 and 39,764.08 is: 59,648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,522.26 : 192,792.40 = 39,764.08 : x
  2. Step 2: Convert to fraction form
    128,522.26/192,792.40 = 39,764.08/x
  3. Step 3: Cross multiply
    128,522.26x = 192,792.40 × 39,764.08
  4. Step 4: Simplify right side
    128,522.26x = 7,666,212,416.99
  5. Step 5: Solve for x
    x = 7,666,212,416.99/128,522.26
  6. Step 6: Final answer
    x = 59,648.91

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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.