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Finding the Fourth Proportional to 65,628.50, 90,529.60 and 41,420.87

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Solution

The fourth proportional to 65,628.50, 90,529.60 and 41,420.87 is: 57,136.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,628.50 : 90,529.60 = 41,420.87 : x
  2. Step 2: Convert to fraction form
    65,628.50/90,529.60 = 41,420.87/x
  3. Step 3: Cross multiply
    65,628.50x = 90,529.60 × 41,420.87
  4. Step 4: Simplify right side
    65,628.50x = 3,749,814,282.59
  5. Step 5: Solve for x
    x = 3,749,814,282.59/65,628.50
  6. Step 6: Final answer
    x = 57,136.98

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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.