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Finding the Fourth Proportional to 64,687.80, 89,265.42 and 36,391.80

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Solution

The fourth proportional to 64,687.80, 89,265.42 and 36,391.80 is: 50,218.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,687.80 : 89,265.42 = 36,391.80 : x
  2. Step 2: Convert to fraction form
    64,687.80/89,265.42 = 36,391.80/x
  3. Step 3: Cross multiply
    64,687.80x = 89,265.42 × 36,391.80
  4. Step 4: Simplify right side
    64,687.80x = 3,248,529,311.56
  5. Step 5: Solve for x
    x = 3,248,529,311.56/64,687.80
  6. Step 6: Final answer
    x = 50,218.58

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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.