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Finding the Fourth Proportional to 218,316.90, 301,255.89 and 122,821.56

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Solution

The fourth proportional to 218,316.90, 301,255.89 and 122,821.56 is: 169,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,316.90 : 301,255.89 = 122,821.56 : x
  2. Step 2: Convert to fraction form
    218,316.90/301,255.89 = 122,821.56/x
  3. Step 3: Cross multiply
    218,316.90x = 301,255.89 × 122,821.56
  4. Step 4: Simplify right side
    218,316.90x = 37,000,718,368.99
  5. Step 5: Solve for x
    x = 37,000,718,368.99/218,316.90
  6. Step 6: Final answer
    x = 169,481.70

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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.