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Finding the Fourth Proportional to 70,631.64, 105,954.12 and 18,041.40

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Solution

The fourth proportional to 70,631.64, 105,954.12 and 18,041.40 is: 27,063.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,631.64 : 105,954.12 = 18,041.40 : x
  2. Step 2: Convert to fraction form
    70,631.64/105,954.12 = 18,041.40/x
  3. Step 3: Cross multiply
    70,631.64x = 105,954.12 × 18,041.40
  4. Step 4: Simplify right side
    70,631.64x = 1,911,560,660.57
  5. Step 5: Solve for x
    x = 1,911,560,660.57/70,631.64
  6. Step 6: Final answer
    x = 27,063.80

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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.