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Finding the Fourth Proportional to 228,639.47, 342,976.94 and 68,702.91

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Solution

The fourth proportional to 228,639.47, 342,976.94 and 68,702.91 is: 103,059.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,639.47 : 342,976.94 = 68,702.91 : x
  2. Step 2: Convert to fraction form
    228,639.47/342,976.94 = 68,702.91/x
  3. Step 3: Cross multiply
    228,639.47x = 342,976.94 × 68,702.91
  4. Step 4: Simplify right side
    228,639.47x = 23,563,515,555.95
  5. Step 5: Solve for x
    x = 23,563,515,555.95/228,639.47
  6. Step 6: Final answer
    x = 103,059.70

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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.