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Finding the Fourth Proportional to 71,585.90, 107,370.64 and 18,999.48

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Solution

The fourth proportional to 71,585.90, 107,370.64 and 18,999.48 is: 28,497.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,585.90 : 107,370.64 = 18,999.48 : x
  2. Step 2: Convert to fraction form
    71,585.90/107,370.64 = 18,999.48/x
  3. Step 3: Cross multiply
    71,585.90x = 107,370.64 × 18,999.48
  4. Step 4: Simplify right side
    71,585.90x = 2,039,986,327.27
  5. Step 5: Solve for x
    x = 2,039,986,327.27/71,585.90
  6. Step 6: Final answer
    x = 28,497.04

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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.