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Finding the Fourth Proportional to 71,378.71, 107,059.78 and 18,792.30

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Solution

The fourth proportional to 71,378.71, 107,059.78 and 18,792.30 is: 28,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.71 : 107,059.78 = 18,792.30 : x
  2. Step 2: Convert to fraction form
    71,378.71/107,059.78 = 18,792.30/x
  3. Step 3: Cross multiply
    71,378.71x = 107,059.78 × 18,792.30
  4. Step 4: Simplify right side
    71,378.71x = 2,011,899,503.69
  5. Step 5: Solve for x
    x = 2,011,899,503.69/71,378.71
  6. Step 6: Final answer
    x = 28,186.27

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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.