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Finding the Fourth Proportional to 57,291.55, 79,076.87 and 39,149.62

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Solution

The fourth proportional to 57,291.55, 79,076.87 and 39,149.62 is: 54,036.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,291.55 : 79,076.87 = 39,149.62 : x
  2. Step 2: Convert to fraction form
    57,291.55/79,076.87 = 39,149.62/x
  3. Step 3: Cross multiply
    57,291.55x = 79,076.87 × 39,149.62
  4. Step 4: Simplify right side
    57,291.55x = 3,095,829,163.69
  5. Step 5: Solve for x
    x = 3,095,829,163.69/57,291.55
  6. Step 6: Final answer
    x = 54,036.40

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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.