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Finding the Fourth Proportional to 121,751.51, 168,032.98 and 68,047.70

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Solution

The fourth proportional to 121,751.51, 168,032.98 and 68,047.70 is: 93,914.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,751.51 : 168,032.98 = 68,047.70 : x
  2. Step 2: Convert to fraction form
    121,751.51/168,032.98 = 68,047.70/x
  3. Step 3: Cross multiply
    121,751.51x = 168,032.98 × 68,047.70
  4. Step 4: Simplify right side
    121,751.51x = 11,434,257,058.04
  5. Step 5: Solve for x
    x = 11,434,257,058.04/121,751.51
  6. Step 6: Final answer
    x = 93,914.71

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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.