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Finding the Fourth Proportional to 118,743.90, 178,060.48 and 68,838.28

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Solution

The fourth proportional to 118,743.90, 178,060.48 and 68,838.28 is: 103,225.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,743.90 : 178,060.48 = 68,838.28 : x
  2. Step 2: Convert to fraction form
    118,743.90/178,060.48 = 68,838.28/x
  3. Step 3: Cross multiply
    118,743.90x = 178,060.48 × 68,838.28
  4. Step 4: Simplify right side
    118,743.90x = 12,257,377,179.17
  5. Step 5: Solve for x
    x = 12,257,377,179.17/118,743.90
  6. Step 6: Final answer
    x = 103,225.32

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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.