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Finding the Fourth Proportional to 218,211.75, 301,130.25 and 122,719.14

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Solution

The fourth proportional to 218,211.75, 301,130.25 and 122,719.14 is: 169,351.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,211.75 : 301,130.25 = 122,719.14 : x
  2. Step 2: Convert to fraction form
    218,211.75/301,130.25 = 122,719.14/x
  3. Step 3: Cross multiply
    218,211.75x = 301,130.25 × 122,719.14
  4. Step 4: Simplify right side
    218,211.75x = 36,954,445,307.99
  5. Step 5: Solve for x
    x = 36,954,445,307.99/218,211.75
  6. Step 6: Final answer
    x = 169,351.31

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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.