Home / 68,711.20-103,124.40-31,328.80

Finding the Fourth Proportional to 68,711.20, 103,124.40 and 31,328.80

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Solution

The fourth proportional to 68,711.20, 103,124.40 and 31,328.80 is: 47,019.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,711.20 : 103,124.40 = 31,328.80 : x
  2. Step 2: Convert to fraction form
    68,711.20/103,124.40 = 31,328.80/x
  3. Step 3: Cross multiply
    68,711.20x = 103,124.40 × 31,328.80
  4. Step 4: Simplify right side
    68,711.20x = 3,230,763,702.72
  5. Step 5: Solve for x
    x = 3,230,763,702.72/68,711.20
  6. Step 6: Final answer
    x = 47,019.46

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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.