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Finding the Fourth Proportional to 121,380.66, 167,515.29 and 66,943.48

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Solution

The fourth proportional to 121,380.66, 167,515.29 and 66,943.48 is: 92,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,380.66 : 167,515.29 = 66,943.48 : x
  2. Step 2: Convert to fraction form
    121,380.66/167,515.29 = 66,943.48/x
  3. Step 3: Cross multiply
    121,380.66x = 167,515.29 × 66,943.48
  4. Step 4: Simplify right side
    121,380.66x = 11,214,056,465.81
  5. Step 5: Solve for x
    x = 11,214,056,465.81/121,380.66
  6. Step 6: Final answer
    x = 92,387.50

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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.