Home / 51,030.78-70,423.92-30,891.30

Finding the Fourth Proportional to 51,030.78, 70,423.92 and 30,891.30

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Solution

The fourth proportional to 51,030.78, 70,423.92 and 30,891.30 is: 42,630.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,030.78 : 70,423.92 = 30,891.30 : x
  2. Step 2: Convert to fraction form
    51,030.78/70,423.92 = 30,891.30/x
  3. Step 3: Cross multiply
    51,030.78x = 70,423.92 × 30,891.30
  4. Step 4: Simplify right side
    51,030.78x = 2,175,486,439.90
  5. Step 5: Solve for x
    x = 2,175,486,439.90/51,030.78
  6. Step 6: Final answer
    x = 42,630.87

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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.