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Finding the Fourth Proportional to 70,268.94, 105,389.82 and 20,336.40

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Solution

The fourth proportional to 70,268.94, 105,389.82 and 20,336.40 is: 30,500.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,268.94 : 105,389.82 = 20,336.40 : x
  2. Step 2: Convert to fraction form
    70,268.94/105,389.82 = 20,336.40/x
  3. Step 3: Cross multiply
    70,268.94x = 105,389.82 × 20,336.40
  4. Step 4: Simplify right side
    70,268.94x = 2,143,249,535.45
  5. Step 5: Solve for x
    x = 2,143,249,535.45/70,268.94
  6. Step 6: Final answer
    x = 30,500.67

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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.