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Finding the Fourth Proportional to 121,993.32, 168,312.42 and 68,269.80

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Solution

The fourth proportional to 121,993.32, 168,312.42 and 68,269.80 is: 94,190.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,993.32 : 168,312.42 = 68,269.80 : x
  2. Step 2: Convert to fraction form
    121,993.32/168,312.42 = 68,269.80/x
  3. Step 3: Cross multiply
    121,993.32x = 168,312.42 × 68,269.80
  4. Step 4: Simplify right side
    121,993.32x = 11,490,655,250.92
  5. Step 5: Solve for x
    x = 11,490,655,250.92/121,993.32
  6. Step 6: Final answer
    x = 94,190.86

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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.