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Finding the Fourth Proportional to 71,145.57, 106,718.34 and 18,554.88

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Solution

The fourth proportional to 71,145.57, 106,718.34 and 18,554.88 is: 27,832.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,145.57 : 106,718.34 = 18,554.88 : x
  2. Step 2: Convert to fraction form
    71,145.57/106,718.34 = 18,554.88/x
  3. Step 3: Cross multiply
    71,145.57x = 106,718.34 × 18,554.88
  4. Step 4: Simplify right side
    71,145.57x = 1,980,145,992.50
  5. Step 5: Solve for x
    x = 1,980,145,992.50/71,145.57
  6. Step 6: Final answer
    x = 27,832.32

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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.