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Finding the Fourth Proportional to 65,792.97, 90,788.79 and 38,930.78

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Solution

The fourth proportional to 65,792.97, 90,788.79 and 38,930.78 is: 53,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,792.97 : 90,788.79 = 38,930.78 : x
  2. Step 2: Convert to fraction form
    65,792.97/90,788.79 = 38,930.78/x
  3. Step 3: Cross multiply
    65,792.97x = 90,788.79 × 38,930.78
  4. Step 4: Simplify right side
    65,792.97x = 3,534,477,956.01
  5. Step 5: Solve for x
    x = 3,534,477,956.01/65,792.97
  6. Step 6: Final answer
    x = 53,721.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.