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Finding the Fourth Proportional to 71,146.58, 106,719.84 and 18,555.92

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Solution

The fourth proportional to 71,146.58, 106,719.84 and 18,555.92 is: 27,833.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,146.58 : 106,719.84 = 18,555.92 : x
  2. Step 2: Convert to fraction form
    71,146.58/106,719.84 = 18,555.92/x
  3. Step 3: Cross multiply
    71,146.58x = 106,719.84 × 18,555.92
  4. Step 4: Simplify right side
    71,146.58x = 1,980,284,813.45
  5. Step 5: Solve for x
    x = 1,980,284,813.45/71,146.58
  6. Step 6: Final answer
    x = 27,833.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.