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Finding the Fourth Proportional to 57,793.28, 79,710.48 and 39,918.20

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Solution

The fourth proportional to 57,793.28, 79,710.48 and 39,918.20 is: 55,056.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,793.28 : 79,710.48 = 39,918.20 : x
  2. Step 2: Convert to fraction form
    57,793.28/79,710.48 = 39,918.20/x
  3. Step 3: Cross multiply
    57,793.28x = 79,710.48 × 39,918.20
  4. Step 4: Simplify right side
    57,793.28x = 3,181,898,882.74
  5. Step 5: Solve for x
    x = 3,181,898,882.74/57,793.28
  6. Step 6: Final answer
    x = 55,056.55

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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.