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Finding the Fourth Proportional to 70,180.07, 105,238.84 and 20,248.30

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Solution

The fourth proportional to 70,180.07, 105,238.84 and 20,248.30 is: 30,363.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,180.07 : 105,238.84 = 20,248.30 : x
  2. Step 2: Convert to fraction form
    70,180.07/105,238.84 = 20,248.30/x
  3. Step 3: Cross multiply
    70,180.07x = 105,238.84 × 20,248.30
  4. Step 4: Simplify right side
    70,180.07x = 2,130,907,338.65
  5. Step 5: Solve for x
    x = 2,130,907,338.65/70,180.07
  6. Step 6: Final answer
    x = 30,363.43

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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.