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Finding the Fourth Proportional to 217,858.59, 300,638.86 and 121,059.95

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Solution

The fourth proportional to 217,858.59, 300,638.86 and 121,059.95 is: 167,059.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,858.59 : 300,638.86 = 121,059.95 : x
  2. Step 2: Convert to fraction form
    217,858.59/300,638.86 = 121,059.95/x
  3. Step 3: Cross multiply
    217,858.59x = 300,638.86 × 121,059.95
  4. Step 4: Simplify right side
    217,858.59x = 36,395,323,553.81
  5. Step 5: Solve for x
    x = 36,395,323,553.81/217,858.59
  6. Step 6: Final answer
    x = 167,059.39

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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.