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Finding the Fourth Proportional to 71,588.16, 107,390.88 and 18,998.64

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Solution

The fourth proportional to 71,588.16, 107,390.88 and 18,998.64 is: 28,500.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,588.16 : 107,390.88 = 18,998.64 : x
  2. Step 2: Convert to fraction form
    71,588.16/107,390.88 = 18,998.64/x
  3. Step 3: Cross multiply
    71,588.16x = 107,390.88 × 18,998.64
  4. Step 4: Simplify right side
    71,588.16x = 2,040,280,668.40
  5. Step 5: Solve for x
    x = 2,040,280,668.40/71,588.16
  6. Step 6: Final answer
    x = 28,500.25

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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.