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Finding the Fourth Proportional to 218,618.64, 301,685.85 and 123,134.22

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Solution

The fourth proportional to 218,618.64, 301,685.85 and 123,134.22 is: 169,920.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,618.64 : 301,685.85 = 123,134.22 : x
  2. Step 2: Convert to fraction form
    218,618.64/301,685.85 = 123,134.22/x
  3. Step 3: Cross multiply
    218,618.64x = 301,685.85 × 123,134.22
  4. Step 4: Simplify right side
    218,618.64x = 37,147,851,824.79
  5. Step 5: Solve for x
    x = 37,147,851,824.79/218,618.64
  6. Step 6: Final answer
    x = 169,920.79

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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.