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Finding the Fourth Proportional to 218,585.78, 301,653.52 and 121,796.18

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Solution

The fourth proportional to 218,585.78, 301,653.52 and 121,796.18 is: 168,081.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,585.78 : 301,653.52 = 121,796.18 : x
  2. Step 2: Convert to fraction form
    218,585.78/301,653.52 = 121,796.18/x
  3. Step 3: Cross multiply
    218,585.78x = 301,653.52 × 121,796.18
  4. Step 4: Simplify right side
    218,585.78x = 36,740,246,419.55
  5. Step 5: Solve for x
    x = 36,740,246,419.55/218,585.78
  6. Step 6: Final answer
    x = 168,081.59

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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.