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Finding the Fourth Proportional to 71,788.80, 99,067.68 and 41,980.80

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Solution

The fourth proportional to 71,788.80, 99,067.68 and 41,980.80 is: 57,933.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.80 : 99,067.68 = 41,980.80 : x
  2. Step 2: Convert to fraction form
    71,788.80/99,067.68 = 41,980.80/x
  3. Step 3: Cross multiply
    71,788.80x = 99,067.68 × 41,980.80
  4. Step 4: Simplify right side
    71,788.80x = 4,158,940,460.54
  5. Step 5: Solve for x
    x = 4,158,940,460.54/71,788.80
  6. Step 6: Final answer
    x = 57,933.00

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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.