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Finding the Fourth Proportional to 57,110.62, 78,822.02 and 39,190.90

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Solution

The fourth proportional to 57,110.62, 78,822.02 and 39,190.90 is: 54,089.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,110.62 : 78,822.02 = 39,190.90 : x
  2. Step 2: Convert to fraction form
    57,110.62/78,822.02 = 39,190.90/x
  3. Step 3: Cross multiply
    57,110.62x = 78,822.02 × 39,190.90
  4. Step 4: Simplify right side
    57,110.62x = 3,089,105,903.62
  5. Step 5: Solve for x
    x = 3,089,105,903.62/57,110.62
  6. Step 6: Final answer
    x = 54,089.87

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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.