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Finding the Fourth Proportional to 121,993.75, 168,341.65 and 68,276.17

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Solution

The fourth proportional to 121,993.75, 168,341.65 and 68,276.17 is: 94,215.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,993.75 : 168,341.65 = 68,276.17 : x
  2. Step 2: Convert to fraction form
    121,993.75/168,341.65 = 68,276.17/x
  3. Step 3: Cross multiply
    121,993.75x = 168,341.65 × 68,276.17
  4. Step 4: Simplify right side
    121,993.75x = 11,493,723,113.48
  5. Step 5: Solve for x
    x = 11,493,723,113.48/121,993.75
  6. Step 6: Final answer
    x = 94,215.67

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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.