Home / 145,519.68-200,815.84-81,857.96

Finding the Fourth Proportional to 145,519.68, 200,815.84 and 81,857.96

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Solution

The fourth proportional to 145,519.68, 200,815.84 and 81,857.96 is: 112,963.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,519.68 : 200,815.84 = 81,857.96 : x
  2. Step 2: Convert to fraction form
    145,519.68/200,815.84 = 81,857.96/x
  3. Step 3: Cross multiply
    145,519.68x = 200,815.84 × 81,857.96
  4. Step 4: Simplify right side
    145,519.68x = 16,438,374,998.09
  5. Step 5: Solve for x
    x = 16,438,374,998.09/145,519.68
  6. Step 6: Final answer
    x = 112,963.24

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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.