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Finding the Fourth Proportional to 118,388.76, 163,381.36 and 68,087.76

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Solution

The fourth proportional to 118,388.76, 163,381.36 and 68,087.76 is: 93,963.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,388.76 : 163,381.36 = 68,087.76 : x
  2. Step 2: Convert to fraction form
    118,388.76/163,381.36 = 68,087.76/x
  3. Step 3: Cross multiply
    118,388.76x = 163,381.36 × 68,087.76
  4. Step 4: Simplify right side
    118,388.76x = 11,124,270,828.15
  5. Step 5: Solve for x
    x = 11,124,270,828.15/118,388.76
  6. Step 6: Final answer
    x = 93,963.91

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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.