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Finding the Fourth Proportional to 57,455.78, 79,223.59 and 40,454.58

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Solution

The fourth proportional to 57,455.78, 79,223.59 and 40,454.58 is: 55,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,455.78 : 79,223.59 = 40,454.58 : x
  2. Step 2: Convert to fraction form
    57,455.78/79,223.59 = 40,454.58/x
  3. Step 3: Cross multiply
    57,455.78x = 79,223.59 × 40,454.58
  4. Step 4: Simplify right side
    57,455.78x = 3,204,956,958.41
  5. Step 5: Solve for x
    x = 3,204,956,958.41/57,455.78
  6. Step 6: Final answer
    x = 55,781.28

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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.