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Finding the Fourth Proportional to 100,977.62, 139,348.49 and 55,037.21

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Solution

The fourth proportional to 100,977.62, 139,348.49 and 55,037.21 is: 75,951.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,977.62 : 139,348.49 = 55,037.21 : x
  2. Step 2: Convert to fraction form
    100,977.62/139,348.49 = 55,037.21/x
  3. Step 3: Cross multiply
    100,977.62x = 139,348.49 × 55,037.21
  4. Step 4: Simplify right side
    100,977.62x = 7,669,351,135.38
  5. Step 5: Solve for x
    x = 7,669,351,135.38/100,977.62
  6. Step 6: Final answer
    x = 75,951.00

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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.