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Finding the Fourth Proportional to 121,763.75, 168,041.43 and 68,053.05

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Solution

The fourth proportional to 121,763.75, 168,041.43 and 68,053.05 is: 93,917.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,763.75 : 168,041.43 = 68,053.05 : x
  2. Step 2: Convert to fraction form
    121,763.75/168,041.43 = 68,053.05/x
  3. Step 3: Cross multiply
    121,763.75x = 168,041.43 × 68,053.05
  4. Step 4: Simplify right side
    121,763.75x = 11,435,731,837.86
  5. Step 5: Solve for x
    x = 11,435,731,837.86/121,763.75
  6. Step 6: Final answer
    x = 93,917.38

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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.