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Finding the Fourth Proportional to 121,778.35, 168,105.95 and 74,047.03

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Solution

The fourth proportional to 121,778.35, 168,105.95 and 74,047.03 is: 102,216.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,778.35 : 168,105.95 = 74,047.03 : x
  2. Step 2: Convert to fraction form
    121,778.35/168,105.95 = 74,047.03/x
  3. Step 3: Cross multiply
    121,778.35x = 168,105.95 × 74,047.03
  4. Step 4: Simplify right side
    121,778.35x = 12,447,745,952.59
  5. Step 5: Solve for x
    x = 12,447,745,952.59/121,778.35
  6. Step 6: Final answer
    x = 102,216.41

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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.