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Finding the Fourth Proportional to 121,810.89, 168,100.28 and 68,098.89

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Solution

The fourth proportional to 121,810.89, 168,100.28 and 68,098.89 is: 93,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,810.89 : 168,100.28 = 68,098.89 : x
  2. Step 2: Convert to fraction form
    121,810.89/168,100.28 = 68,098.89/x
  3. Step 3: Cross multiply
    121,810.89x = 168,100.28 × 68,098.89
  4. Step 4: Simplify right side
    121,810.89x = 11,447,442,136.19
  5. Step 5: Solve for x
    x = 11,447,442,136.19/121,810.89
  6. Step 6: Final answer
    x = 93,977.17

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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.