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Finding the Fourth Proportional to 98,684.76, 136,206.82 and 68,100.78

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Solution

The fourth proportional to 98,684.76, 136,206.82 and 68,100.78 is: 93,994.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,684.76 : 136,206.82 = 68,100.78 : x
  2. Step 2: Convert to fraction form
    98,684.76/136,206.82 = 68,100.78/x
  3. Step 3: Cross multiply
    98,684.76x = 136,206.82 × 68,100.78
  4. Step 4: Simplify right side
    98,684.76x = 9,275,790,683.32
  5. Step 5: Solve for x
    x = 9,275,790,683.32/98,684.76
  6. Step 6: Final answer
    x = 93,994.16

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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.