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Finding the Fourth Proportional to 71,977.78, 99,324.83 and 39,712.78

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Solution

The fourth proportional to 71,977.78, 99,324.83 and 39,712.78 is: 54,801.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,977.78 : 99,324.83 = 39,712.78 : x
  2. Step 2: Convert to fraction form
    71,977.78/99,324.83 = 39,712.78/x
  3. Step 3: Cross multiply
    71,977.78x = 99,324.83 × 39,712.78
  4. Step 4: Simplify right side
    71,977.78x = 3,944,465,345.77
  5. Step 5: Solve for x
    x = 3,944,465,345.77/71,977.78
  6. Step 6: Final answer
    x = 54,801.15

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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.