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Finding the Fourth Proportional to 57,679.70, 86,519.55 and 35,420.90

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Solution

The fourth proportional to 57,679.70, 86,519.55 and 35,420.90 is: 53,131.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,679.70 : 86,519.55 = 35,420.90 : x
  2. Step 2: Convert to fraction form
    57,679.70/86,519.55 = 35,420.90/x
  3. Step 3: Cross multiply
    57,679.70x = 86,519.55 × 35,420.90
  4. Step 4: Simplify right side
    57,679.70x = 3,064,600,328.60
  5. Step 5: Solve for x
    x = 3,064,600,328.60/57,679.70
  6. Step 6: Final answer
    x = 53,131.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.