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Finding the Fourth Proportional to 70,172.87, 105,246.61 and 20,240.69

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Solution

The fourth proportional to 70,172.87, 105,246.61 and 20,240.69 is: 30,357.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,172.87 : 105,246.61 = 20,240.69 : x
  2. Step 2: Convert to fraction form
    70,172.87/105,246.61 = 20,240.69/x
  3. Step 3: Cross multiply
    70,172.87x = 105,246.61 × 20,240.69
  4. Step 4: Simplify right side
    70,172.87x = 2,130,264,219.08
  5. Step 5: Solve for x
    x = 2,130,264,219.08/70,172.87
  6. Step 6: Final answer
    x = 30,357.38

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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.