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Finding the Fourth Proportional to 121,705.36, 167,941.32 and 67,989.22

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Solution

The fourth proportional to 121,705.36, 167,941.32 and 67,989.22 is: 93,818.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,705.36 : 167,941.32 = 67,989.22 : x
  2. Step 2: Convert to fraction form
    121,705.36/167,941.32 = 67,989.22/x
  3. Step 3: Cross multiply
    121,705.36x = 167,941.32 × 67,989.22
  4. Step 4: Simplify right side
    121,705.36x = 11,418,199,352.57
  5. Step 5: Solve for x
    x = 11,418,199,352.57/121,705.36
  6. Step 6: Final answer
    x = 93,818.38

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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.