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Finding the Fourth Proportional to 121,859.52, 168,164.76 and 68,143.80

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Solution

The fourth proportional to 121,859.52, 168,164.76 and 68,143.80 is: 94,037.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,859.52 : 168,164.76 = 68,143.80 : x
  2. Step 2: Convert to fraction form
    121,859.52/168,164.76 = 68,143.80/x
  3. Step 3: Cross multiply
    121,859.52x = 168,164.76 × 68,143.80
  4. Step 4: Simplify right side
    121,859.52x = 11,459,385,772.49
  5. Step 5: Solve for x
    x = 11,459,385,772.49/121,859.52
  6. Step 6: Final answer
    x = 94,037.67

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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.