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Finding the Fourth Proportional to 121,809.88, 168,098.28 and 68,097.16

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Solution

The fourth proportional to 121,809.88, 168,098.28 and 68,097.16 is: 93,974.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,809.88 : 168,098.28 = 68,097.16 : x
  2. Step 2: Convert to fraction form
    121,809.88/168,098.28 = 68,097.16/x
  3. Step 3: Cross multiply
    121,809.88x = 168,098.28 × 68,097.16
  4. Step 4: Simplify right side
    121,809.88x = 11,447,015,468.88
  5. Step 5: Solve for x
    x = 11,447,015,468.88/121,809.88
  6. Step 6: Final answer
    x = 93,974.44

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1.5x scale

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.