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Finding the Fourth Proportional to 121,809.78, 168,098.69 and 68,097.74

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Solution

The fourth proportional to 121,809.78, 168,098.69 and 68,097.74 is: 93,975.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,809.78 : 168,098.69 = 68,097.74 : x
  2. Step 2: Convert to fraction form
    121,809.78/168,098.69 = 68,097.74/x
  3. Step 3: Cross multiply
    121,809.78x = 168,098.69 × 68,097.74
  4. Step 4: Simplify right side
    121,809.78x = 11,447,140,215.71
  5. Step 5: Solve for x
    x = 11,447,140,215.71/121,809.78
  6. Step 6: Final answer
    x = 93,975.54

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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.