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Finding the Fourth Proportional to 70,568.45, 105,841.71 and 20,636.81

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Solution

The fourth proportional to 70,568.45, 105,841.71 and 20,636.81 is: 30,952.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,568.45 : 105,841.71 = 20,636.81 : x
  2. Step 2: Convert to fraction form
    70,568.45/105,841.71 = 20,636.81/x
  3. Step 3: Cross multiply
    70,568.45x = 105,841.71 × 20,636.81
  4. Step 4: Simplify right side
    70,568.45x = 2,184,234,730.14
  5. Step 5: Solve for x
    x = 2,184,234,730.14/70,568.45
  6. Step 6: Final answer
    x = 30,952.00

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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.