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Finding the Fourth Proportional to 70,173.87, 105,248.11 and 20,241.69

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Solution

The fourth proportional to 70,173.87, 105,248.11 and 20,241.69 is: 30,358.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,173.87 : 105,248.11 = 20,241.69 : x
  2. Step 2: Convert to fraction form
    70,173.87/105,248.11 = 20,241.69/x
  3. Step 3: Cross multiply
    70,173.87x = 105,248.11 × 20,241.69
  4. Step 4: Simplify right side
    70,173.87x = 2,130,399,615.71
  5. Step 5: Solve for x
    x = 2,130,399,615.71/70,173.87
  6. Step 6: Final answer
    x = 30,358.87

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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.