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Finding the Fourth Proportional to 121,783.08, 168,057.74 and 68,073.09

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Solution

The fourth proportional to 121,783.08, 168,057.74 and 68,073.09 is: 93,939.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,783.08 : 168,057.74 = 68,073.09 : x
  2. Step 2: Convert to fraction form
    121,783.08/168,057.74 = 68,073.09/x
  3. Step 3: Cross multiply
    121,783.08x = 168,057.74 × 68,073.09
  4. Step 4: Simplify right side
    121,783.08x = 11,440,209,762.60
  5. Step 5: Solve for x
    x = 11,440,209,762.60/121,783.08
  6. Step 6: Final answer
    x = 93,939.24

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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.