Home / 145,043.25-200,163.13-81,385.76

Finding the Fourth Proportional to 145,043.25, 200,163.13 and 81,385.76

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Solution

The fourth proportional to 145,043.25, 200,163.13 and 81,385.76 is: 112,314.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,043.25 : 200,163.13 = 81,385.76 : x
  2. Step 2: Convert to fraction form
    145,043.25/200,163.13 = 81,385.76/x
  3. Step 3: Cross multiply
    145,043.25x = 200,163.13 × 81,385.76
  4. Step 4: Simplify right side
    145,043.25x = 16,290,427,712.54
  5. Step 5: Solve for x
    x = 16,290,427,712.54/145,043.25
  6. Step 6: Final answer
    x = 112,314.28

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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.