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Finding the Fourth Proportional to 51,051.69, 70,452.90 and 30,912.30

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Solution

The fourth proportional to 51,051.69, 70,452.90 and 30,912.30 is: 42,659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,051.69 : 70,452.90 = 30,912.30 : x
  2. Step 2: Convert to fraction form
    51,051.69/70,452.90 = 30,912.30/x
  3. Step 3: Cross multiply
    51,051.69x = 70,452.90 × 30,912.30
  4. Step 4: Simplify right side
    51,051.69x = 2,177,861,180.67
  5. Step 5: Solve for x
    x = 2,177,861,180.67/51,051.69
  6. Step 6: Final answer
    x = 42,659.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.