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Finding the Fourth Proportional to 71,230.42, 106,842.66 and 18,638.74

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Solution

The fourth proportional to 71,230.42, 106,842.66 and 18,638.74 is: 27,957.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,230.42 : 106,842.66 = 18,638.74 : x
  2. Step 2: Convert to fraction form
    71,230.42/106,842.66 = 18,638.74/x
  3. Step 3: Cross multiply
    71,230.42x = 106,842.66 × 18,638.74
  4. Step 4: Simplify right side
    71,230.42x = 1,991,412,560.65
  5. Step 5: Solve for x
    x = 1,991,412,560.65/71,230.42
  6. Step 6: Final answer
    x = 27,957.33

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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.