Home / 51,005.40-70,375.92-30,861.78

Finding the Fourth Proportional to 51,005.40, 70,375.92 and 30,861.78

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Solution

The fourth proportional to 51,005.40, 70,375.92 and 30,861.78 is: 42,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,005.40 : 70,375.92 = 30,861.78 : x
  2. Step 2: Convert to fraction form
    51,005.40/70,375.92 = 30,861.78/x
  3. Step 3: Cross multiply
    51,005.40x = 70,375.92 × 30,861.78
  4. Step 4: Simplify right side
    51,005.40x = 2,171,926,160.34
  5. Step 5: Solve for x
    x = 2,171,926,160.34/51,005.40
  6. Step 6: Final answer
    x = 42,582.28

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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.