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Finding the Fourth Proportional to 122,118.56, 168,538.56 and 74,378.84

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Solution

The fourth proportional to 122,118.56, 168,538.56 and 74,378.84 is: 102,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,118.56 : 168,538.56 = 74,378.84 : x
  2. Step 2: Convert to fraction form
    122,118.56/168,538.56 = 74,378.84/x
  3. Step 3: Cross multiply
    122,118.56x = 168,538.56 × 74,378.84
  4. Step 4: Simplify right side
    122,118.56x = 12,535,702,588.07
  5. Step 5: Solve for x
    x = 12,535,702,588.07/122,118.56
  6. Step 6: Final answer
    x = 102,651.90

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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.