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Finding the Fourth Proportional to 149,037.80, 205,671.30 and 81,969.80

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Solution

The fourth proportional to 149,037.80, 205,671.30 and 81,969.80 is: 113,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,037.80 : 205,671.30 = 81,969.80 : x
  2. Step 2: Convert to fraction form
    149,037.80/205,671.30 = 81,969.80/x
  3. Step 3: Cross multiply
    149,037.80x = 205,671.30 × 81,969.80
  4. Step 4: Simplify right side
    149,037.80x = 16,858,835,326.74
  5. Step 5: Solve for x
    x = 16,858,835,326.74/149,037.80
  6. Step 6: Final answer
    x = 113,117.85

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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.